Reapply "Add missing admin action files and navigation links"

This reverts commit 4d515bc400.

src/app/admin/catalog/builder-club/page.tsx

@@ -0,0 +1,5 @@
+import { redirect } from 'next/navigation'
+
+export default function BuilderClubPage() {
+  redirect('/admin/catalog?catalog=bc')
+}