B2B-88: add starter kit structure and elements

packages/cms/keystatic/src/keystatic-admin.tsx

@@ -0,0 +1,7 @@
+'use client';
+
+import { makePage } from '@keystatic/next/ui/app';
+
+import { keyStaticConfig } from './keystatic.config';
+
+export default makePage(keyStaticConfig);