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/hide-paths/readme.mdx

@@ -0,0 +1,30 @@
+---
+title: Hide or remove paths from an inherited part
+---
+
+To hide paths from an inherited part, iterate over the `paths` object
+and call `Path.hide()` on all entries:
+
+```mjs
+for (const i in paths) paths[i].hide()
+```
+
+To outright remove the paths all together, delete them:
+
+```mjs
+for (const i in paths) delete paths[i]
+```
+
+:::warning
+Do __not__ replace the `path` object:
+
+```mjs
+paths = {}
+```
+
+as the `paths` object is more than a pojo (plain old JavaScript object)
+:::
+
+:::tip
+You can use the same strategy for hiding or removing points or snippets.
+:::