chore: Port FreeSewing.dev to docusaurus

The replaces the NextJS site powering FreeSewing.dev with a Docusaurus
setup. It's part of my efforts to simplify FreeSewing's setup so we can
focus on our core value proposition.

sites/dev/docs/howtos/code/from/readme.mdx

@@ -0,0 +1,36 @@
+---
+title: Part inheritance
+---
+
+Part inheritance means that rather than start your part from a blank slate, your starting point is another part.
+You will _inherit_ all its points, paths, and snippets, hence the name.
+
+:::warning
+Do not confuse this with [part dependencies](/howtos/code/after).
+:::
+
+Part inheritance is configured with [the `from`
+keyword](/reference/api/part/config/dependencies#from). Let's look at an
+example:
+
+```js
+// highlight-start
+import { front as brianFront } from '@freesewing/brian'
+// highlight-end
+
+export const front = {
+  name: 'example.front',
+// highlight-start
+  from: brianFront,
+// highlight-end
+  draft: function ({ part }) {
+    // Design part here
+    return part
+  }
+}
+```
+
+:::tip
+Refer to [the part documentation on
+dependencies](/reference/api/part/config/dependencies) for all details.
+:::