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/part/unhide/readme.mdx

@@ -0,0 +1,28 @@
+---
+title: Part.unhide()
+---
+
+The `Part.unhide()` method will mark the part as not hidden.
+This method returns the `part` object, so it's chainable.
+
+:::tip
+This method can be destructured as `inhide` 
+in [a part's draft method](/reference/api/part/draft).
+:::
+
+:::note RELATED
+
+The [hide](/reference/api/part/hide) and
+[setHidden](/reference/api/part/sethidden) methods also control a
+part's visibility
+
+:::
+
+## Part.unhide() example
+
+```js
+cont part = {
+  name: 'examples.hide',
+  draft: ({ unhide, part }) =>  part.unhide()
+}
+```