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/howtos/code/accessing-options/readme.mdx

@@ -0,0 +1,27 @@
+---
+title: Accessing options
+---
+
+Options are available on the `options` key of from the object
+passed to your part's draft method. You can destructure them for easy access.
+
+```design/src/part.mjs
+function draftPart = ({
+  // highlight-start
+  options,
+  // highlight-end
+  part
+}) {
+
+  const a = options.fitKnee
+  const b = options[waistEase]
+
+  return part
+}
+```
+
+:::note
+
+Unlike measurements, options come with default values.
+
+:::