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/store-methods/storemacroids/readme.mdx

@@ -0,0 +1,29 @@
+---
+title: storeMacroIds()
+---
+
+Stores data for macro IDs generated via [`generateMacroIds()`](/reference/store-methods/generatemacroids).
+
+## Signature
+
+```mjs
+Object store.storeMacroIds(
+  String id,
+  Array ids,
+  macro = store.activeMacro,
+  part = store.activePart,
+)
+```
+
+The method takes a (macro) id and an object of ids and stores it in the store under the active macro and part.
+
+Or, if you want to, you can pass in `macro` and `part` to not use the active macro or part.
+
+## Example
+
+```mjs
+const ids = store.getMacroIds('macroId', ids)
+```
+
+Storing this data is a requirement to allow removal of macros.
+