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/utils/curveedge/readme.mdx

@@ -0,0 +1,46 @@
+---
+title: utils.curveEdge()
+---
+
+The `utils.curveEdge()` function finds the edge of a cubic Bézier curve,
+given the curve, the edge to find ("top", "bottom", "left", or "right"),
+and the number of steps to divide the curve into while walking it.
+
+## Signature
+
+```js
+Point utils.curveEdge(
+  Bezier curve,
+  string edge,
+  int steps = 500)
+```
+
+## Example
+
+<Example caption="A Utils.curveEdge() example">
+```js
+({ Point, points, Path, paths, Snippet, snippets, utils, Bezier, part }) => {
+
+  points.A = new Point(20, 10)
+  points.Acp = new Point(310, 40)
+  points.Bcp = new Point(-210, 40)
+  points.B = new Point(100, 70)
+
+  paths.pathA = new Path()
+    .move(points.A)
+    .curve(points.Acp, points.Bcp, points.B)
+
+  const curveA = new Bezier(
+    { x: points.A.x, y: points.A.y },
+    { x: points.Acp.x, y: points.Acp.y },
+    { x: points.Bcp.x, y: points.Bcp.y },
+    { x: points.B.x, y: points.B.y }
+  )
+
+  points.edge = utils.curveEdge(curveA, "left")
+  snippets.edge = new Snippet("notch", points.edge)
+
+  return part
+}
+```
+</Example>