chore: reorganize docs apps (#7228)

* reorganize docs apps

* add README

* fix directory

* add condition for old docs

www/apps/resources/scripts/generate-slug-changes.mjs

@@ -0,0 +1,19 @@
+import { writeFileSync } from "fs"
+import getSlugs from "../utils/get-slugs.mjs"
+import path from "path"
+
+export async function main() {
+  const slugs = await getSlugs()
+  slugs.push(
+    ...(await getSlugs({
+      basePath: path.resolve("references"),
+      baseSlug: path.resolve(),
+    }))
+  )
+
+  // write generated slugs
+  writeFileSync(
+    path.resolve("generated", "slug-changes.mjs"),
+    `export const slugChanges = ${JSON.stringify(slugs, null, 2)}`
+  )
+}