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/point/setcircle/readme.mdx

@@ -0,0 +1,50 @@
+---
+title: Point.setCircle()
+---
+
+The `Point.setCircle()` method adds a circle to a Point. It yields similar
+results as the [`Point.addCircle()`](/reference/api/point/addcircle) method,
+the different is that `Point.setCircle()` will overwrite any previous circle
+set.
+
+Essentially, it mimics the difference between adding vs setting an attribute.
+
+Refer to [Drawing circles](/howtos/code/drawing-circles) for more details on
+how circles are handled.
+
+## Signature
+
+```js
+Point point.setCircle(
+  number radius,
+  string className
+)
+```
+
+:::tipThis method is chainable as it returns the `Point` object:::
+
+## Example
+
+<Example caption="Examples of Point.setCircle(), compare this to [Point.addCircle()](/reference/api/point/addcircle)">
+```js
+({ Point, points, part }) => {
+
+  points.a = new Point(30, 10)
+    .setCircle(3, 'lining dashed')
+    .setCircle(7, 'mark dashed')
+
+  points.b = new Point(50, 10)
+    .setCircle(1, 'interfacing')
+    .setCircle(3, 'fabric')
+    .setCircle(5, 'lining')
+    .setCircle(7, 'mark')
+    .setCircle(9, 'note')
+
+  points.c = new Point(70, 10)
+    .setCircle(3, 'interfacing')
+    .setCircle(7, 'mark lashed')
+
+  return part
+}
+```
+</Example>