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/snippet/clone/readme.mdx

@@ -0,0 +1,36 @@
+---
+title: Snippet.clone()
+---
+
+The `Snippet.clone()` method returns a new Snippets object that is a deep copy
+of this one.
+
+## Signature
+
+```js
+Snippet snippet.clone()
+```
+
+## Example
+
+<Example caption="An example of the Snippet.clone() method">
+```js
+({ Point, Path, paths, Snippet, snippets, part }) => {
+
+  snippets.demo = new Snippet("logo", new Point(0,0))
+    .attr("style", "color: #f006")
+  
+  snippets.clone = snippets.demo
+    .clone()
+    .attr("data-scale", 0.5)
+
+  // Prevent clipping
+  paths.diag = new Path()
+    .move(new Point(-25,-30))
+    .move(new Point(25,15))
+
+  return part
+}
+```
+</Example>
+