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/reference/packages/react-components/readme.mdx

@@ -0,0 +1,38 @@
+---
+title: react-components
+---
+
+Published as [@freesewing/react-components][1], this package provides
+various React components to render FreeSewing patterns, as well as 
+some utilities to facilitate frontend integration.
+
+## Exports
+
+FreeSewing uses named exports, and below is a list of all exports:
+
+- `Pattern`: Renders a FreeSewing pattern
+- `Svg`: Renders the svg section of a FreeSewing pattern
+- `Defs`: Renders the defs of a FreeSewing pattern
+- `Group`: Renders an SVG group of a FreeSewing pattern
+- `Stack`: Renders a stack of a FreeSewing pattern
+- `Part`: Renders a part of a FreeSewing pattern
+- `Point`: Renders a point of a FreeSewing pattern
+- `Path`: Renders a path of a FreeSewing pattern
+- `Snippet`: Renders a snippet of a FreeSewing pattern
+- `Grid`: Renders the grid of a FreeSewing pattern
+- `Text`: Renders text of a FreeSewing pattern
+- `TextOnPath`: Renders text on path of a FreeSewing pattern
+- `PatternXray`: Renders the Xray/inspector variant of a FreeSewing pattern
+- `utils`: A plain object holding the following utilities:
+  - `getProps`
+  - `withinPartBounds`
+  - `getId`
+  - `translateStrings`
+
+## Installation
+
+```sh
+npm install @freesewing/react-components
+```
+
+[1]: https://www.npmjs.com/package/@freesewing/react-components