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/api/path/bbox/readme.mdx

@@ -0,0 +1,25 @@
+---
+title: Path.bbox()
+---
+
+The `Path.bbox()` method returns an object describing the bounding box of a path.
+In other words, it gives you a rectangle the Path fits in.
+
+## Signature
+
+```js
+object path.bbox()
+```
+
+It returns an object with a signature like this:
+
+```js
+{
+  topLeft: Point,
+  bottomRight: Point
+}
+```
+
+## Notes
+
+This method is mostly aimed at people looking to implement their own layout solution.