✨ Added tutorial pattern

packages/tutorial/example/.babelrc

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+{
+  "plugins": [
+    ["prismjs", {
+        "languages": ["javascript", "css", "markup"],
+        "plugins": ["line-numbers"],
+        "theme": "twilight",
+        "css": true
+    }]
+  ]
+}

packages/tutorial/example/README.md

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+<p align="center">
+<a title="Go to freesewing.org" href="https://freesewing.org/"><img src="https://freesewing.org/img/logo/black.svg" align="center" width="150px" alt="Freesewing logo"/></a>
+<br>
+<a href="https://freesewing.org/">FreeSewing v2</a>
+</p>
+<p align="center">A JavaScript library for made-to-measure sewing patterns</p>
+<p align='center'><a
+  href="https://twitter.com/freesewing_org"
+  title="Follow @freesewing_org on Twitter"
+  ><img src="https://img.shields.io/badge/%F3%A0%80%A0-Follow%20us-blue.svg?logo=twitter&logoColor=white&logoWidth=15"
+  alt="Follow @freesewing_org on Twitter"/>
+  </a><a
+  href="https://gitter.im/freesewing/freesewing"
+  title="Chat with us on Gitter"
+  ><img src="https://img.shields.io/badge/%F3%A0%80%A0-Chat%20with%20us-CA0547.svg?logo=gitter&logoColor=white&logoWidth=15"
+  alt="Chat with us on Gitter"/>
+  </a><a
+  href="https://freesewing.org/patrons/join"
+  title="Become a FreeSewing Patron"
+  ><img src="https://img.shields.io/badge/%F3%A0%80%A0-Support%20us-blueviolet.svg?logo=cash-app&logoColor=white&logoWidth=15"
+  alt="Become a FreeSewing Patron"/>
+  </a><a
+  href="https://instagram.com/freesewing_org"
+  title="Follow @freesewing_org on Twitter"
+  ><img src="https://img.shields.io/badge/%F3%A0%80%A0-Follow%20us-E4405F.svg?logo=instagram&logoColor=white&logoWidth=15"
+  alt="Follow @freesewing_org on Twitter"/>
+  </a>
+</p>
+
+# tutorial example
+
+This project was bootstrapped with [Create Freesewing Pattern](https://en.freesewing.dev/create-freesewing-pattern):
+
+```js
+npm init freesewing-pattern
+```
+
+This example folder is part of the local development environment.
+It is **not** part of the pattern's source code.
+
+To run this example, follow these steps:
+
+ - In the folder above this one, run: `yarn start` (or `npm start`)
+ - Then, in new terminal, run the same command in this folder: `yarn start` (or `npm start`)
+
+This will spin up the development environment, similar to [our online demo](https://tutorial.freesewing.dev/).
+
+## About FreeSewing 🤔
+
+Where the world of makers and developers collide, that's where you'll find FreeSewing.
+
+Our [core library](https://freesewing.dev/en/freesewing) is a *batteries-included* toolbox
+for parametric design of sewing patterns. It's a modular system (check our list
+of [plugins](https://freesewing.dev/en/plugins) and getting started is as simple as:
+
+```bash
+npm init freesewing-pattern
+```
+
+The [getting started] section on [freesewing.dev](https://freesewing.dev/) is a good
+entrypoint to our documentation, but you'll find a lot more there, including
+our [API documentation](https://freesewing.dev/en/freesewing/api),
+as well as [examples](https://freesewing.dev/en/freesewing/examples),
+and [best practices](https://freesewing.dev/en/do).
+
+If you're a maker, checkout [freesewing.org](https://freesewing/) where you can generate
+our sewing patterns adapted to your measurements.
+
+## Support FreeSewing: Become a patron 🥰
+
+FreeSewing is an open source project run by a community,
+and financially supported by our patrons.
+
+If you feel what we do is worthwhile, you too
+should [become a patron](https://freesewing.org/patrons/join).
+
+## Links 👩‍💻
+
+ - 💻 Makers website: [freesewing.org](https://freesewing.org)
+ - 💻 Developers website: [freesewing.dev](https://freesewing.org)
+ - 💬 Chat: [gitter.im/freesewing](https://gitter.im/freesewing/freesewing)
+ - 🐦 Twitter: [@freesewing_org](https://twitter.com/freesewing_org)
+ - 📷 Instagram: [@freesewing_org](https://instagram.com/freesewing_org)
+
+## License: MIT 🤓
+
+© [Joost De Cock](https://github.com/joostdecock).
+See [the license file](https://github.com/freesewing/freesewing/blob/develop/LICENSE) for details.
+
+## Where to get help 🤯
+
+Our [chatroom on Gitter](https://gitter.im) is the best place to ask questions,
+share your feedback, or just hang out.
+
+If you want to report a problem, please [create an issue](https://github.com/freesewing/freesewing/issues/new).
+

packages/tutorial/example/package.json

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+{
+  "name": "tutorial-example",
+  "homepage": "https://freesewing.github.io/tutorial",
+  "version": "0.0.0",
+  "private": true,
+  "dependencies": {
+    "@freesewing/components": "beta",
+    "@freesewing/core": "beta",
+    "@freesewing/css-theme": "beta",
+    "@freesewing/i18n": "beta",
+    "@freesewing/models": "beta",
+    "@freesewing/mui-theme": "beta",
+    "@freesewing/pattern-info": "beta",
+    "@freesewing/plugin-bundle": "beta",
+    "@freesewing/plugin-i18n": "beta",
+    "@freesewing/plugin-svgattr": "beta",
+    "@freesewing/utils": "beta",
+    "@material-ui/core": "^4.0.1",
+    "@material-ui/icons": "^4.0.1",
+    "@material-ui/lab": "^v4.0.0-alpha.14",
+    "pattern": "link:..",
+    "prismjs": "1.16.0",
+    "react": "^16.8",
+    "react-dom": "^16.8",
+    "react-scripts": "^3.0.0",
+    "typeface-roboto-condensed": "latest"
+  },
+  "scripts": {
+    "start": "react-scripts start",
+    "build": "react-scripts build",
+    "test": "react-scripts test",
+    "eject": "react-scripts eject"
+  },
+  "eslintConfig": {
+    "extends": "react-app"
+  },
+  "browserslist": [
+    ">0.2%",
+    "not dead",
+    "not ie <= 11",
+    "not op_mini all"
+  ],
+  "devDependencies": {
+    "babel-plugin-prismjs": "1.0.2"
+  }
+}

packages/tutorial/example/public/index.html

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+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <link rel="shortcut icon" href="%PUBLIC_URL%/favicon.ico">
+    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
+    <meta name="theme-color" content="#000000">
+    <!--
+      manifest.json provides metadata used when your web app is added to the
+      homescreen on Android. See https://developers.google.com/web/fundamentals/engage-and-retain/web-app-manifest/
+    -->
+    <link rel="manifest" href="%PUBLIC_URL%/manifest.json">
+    <!--
+      Notice the use of %PUBLIC_URL% in the tags above.
+      It will be replaced with the URL of the `public` folder during the build.
+      Only files inside the `public` folder can be referenced from the HTML.
+
+      Unlike "/favicon.ico" or "favicon.ico", "%PUBLIC_URL%/favicon.ico" will
+      work correctly both with client-side routing and a non-root public URL.
+      Learn how to configure a non-root public URL by running `npm run build`.
+    -->
+    <title>tutorial</title>
+  </head>
+  <body>
+    <noscript>
+      You need to enable JavaScript to run this app.
+    </noscript>
+    <div id="root"></div>
+    <!--
+      This HTML file is a template.
+      If you open it directly in the browser, you will see an empty page.
+
+      You can add webfonts, meta tags, or analytics to this file.
+      The build step will place the bundled scripts into the <body> tag.
+
+      To begin the development, run `npm start` or `yarn start`.
+      To create a production bundle, use `npm run build` or `yarn build`.
+    -->
+  </body>
+</html>

packages/tutorial/example/public/manifest.json

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+{
+  "short_name": "tutorial",
+  "name": "tutorial",
+  "icons": [
+    {
+      "src": "favicon.ico",
+      "sizes": "64x64 32x32 24x24 16x16",
+      "type": "image/x-icon"
+    }
+  ],
+  "start_url": ".",
+  "display": "standalone",
+  "theme_color": "#000000",
+  "background_color": "#ffffff"
+}

packages/tutorial/example/src/App.js

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+import React from "react";
+import freesewing from "@freesewing/core";
+import Workbench from "@freesewing/components/Workbench";
+import "typeface-roboto-condensed";
+import "@freesewing/css-theme";
+
+import Pattern from "pattern";
+
+const App = props => {
+  let instance = new Pattern();
+  let config = instance.config;
+  return (
+    <Workbench
+      freesewing={freesewing}
+      Pattern={Pattern}
+      config={config}
+      userLanguage="en"
+    />
+  );
+};
+
+export default App;

packages/tutorial/example/src/index.js

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+import React from "react";
+import ReactDOM from "react-dom";
+import App from "./App";
+import * as serviceWorker from "./serviceWorker";
+
+ReactDOM.render(<App />, document.getElementById("root"));
+
+// If you want your app to work offline and load faster, you can change
+// unregister() to register() below. Note this comes with some pitfalls.
+// Learn more about service workers: http://bit.ly/CRA-PWA
+serviceWorker.unregister();

packages/tutorial/example/src/serviceWorker.js

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+// In production, we register a service worker to serve assets from local cache.
+
+// This lets the app load faster on subsequent visits in production, and gives
+// it offline capabilities. However, it also means that developers (and users)
+// will only see deployed updates on the "N+1" visit to a page, since previously
+// cached resources are updated in the background.
+
+// To learn more about the benefits of this model, read https://goo.gl/KwvDNy.
+// This link also includes instructions on opting out of this behavior.
+
+const isLocalhost = Boolean(
+  window.location.hostname === "localhost" ||
+    // [::1] is the IPv6 localhost address.
+    window.location.hostname === "[::1]" ||
+    // 127.0.0.1/8 is considered localhost for IPv4.
+    window.location.hostname.match(
+      /^127(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/
+    )
+);
+
+export function register(config) {
+  if (process.env.NODE_ENV === "production" && "serviceWorker" in navigator) {
+    // The URL constructor is available in all browsers that support SW.
+    const publicUrl = new URL(process.env.PUBLIC_URL, window.location);
+    if (publicUrl.origin !== window.location.origin) {
+      // Our service worker won't work if PUBLIC_URL is on a different origin
+      // from what our page is served on. This might happen if a CDN is used to
+      // serve assets; see https://github.com/facebook/create-react-app/issues/2374
+      return;
+    }
+
+    window.addEventListener("load", () => {
+      const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`;
+
+      if (isLocalhost) {
+        // This is running on localhost. Let's check if a service worker still exists or not.
+        checkValidServiceWorker(swUrl, config);
+
+        // Add some additional logging to localhost, pointing developers to the
+        // service worker/PWA documentation.
+        navigator.serviceWorker.ready.then(() => {
+          console.log(
+            "This web app is being served cache-first by a service " +
+              "worker. To learn more, visit https://goo.gl/SC7cgQ"
+          );
+        });
+      } else {
+        // Is not local host. Just register service worker
+        registerValidSW(swUrl, config);
+      }
+    });
+  }
+}
+
+function registerValidSW(swUrl, config) {
+  navigator.serviceWorker
+    .register(swUrl)
+    .then(registration => {
+      registration.onupdatefound = () => {
+        const installingWorker = registration.installing;
+        installingWorker.onstatechange = () => {
+          if (installingWorker.state === "installed") {
+            if (navigator.serviceWorker.controller) {
+              // At this point, the old content will have been purged and
+              // the fresh content will have been added to the cache.
+              // It's the perfect time to display a "New content is
+              // available; please refresh." message in your web app.
+              console.log("New content is available; please refresh.");
+
+              // Execute callback
+              if (config.onUpdate) {
+                config.onUpdate(registration);
+              }
+            } else {
+              // At this point, everything has been precached.
+              // It's the perfect time to display a
+              // "Content is cached for offline use." message.
+              console.log("Content is cached for offline use.");
+
+              // Execute callback
+              if (config.onSuccess) {
+                config.onSuccess(registration);
+              }
+            }
+          }
+        };
+      };
+    })
+    .catch(error => {
+      console.error("Error during service worker registration:", error);
+    });
+}
+
+function checkValidServiceWorker(swUrl, config) {
+  // Check if the service worker can be found. If it can't reload the page.
+  fetch(swUrl)
+    .then(response => {
+      // Ensure service worker exists, and that we really are getting a JS file.
+      if (
+        response.status === 404 ||
+        response.headers.get("content-type").indexOf("javascript") === -1
+      ) {
+        // No service worker found. Probably a different app. Reload the page.
+        navigator.serviceWorker.ready.then(registration => {
+          registration.unregister().then(() => {
+            window.location.reload();
+          });
+        });
+      } else {
+        // Service worker found. Proceed as normal.
+        registerValidSW(swUrl, config);
+      }
+    })
+    .catch(() => {
+      console.log(
+        "No internet connection found. App is running in offline mode."
+      );
+    });
+}
+
+export function unregister() {
+  if ("serviceWorker" in navigator) {
+    navigator.serviceWorker.ready.then(registration => {
+      registration.unregister();
+    });
+  }
+}