chore: bumps packages, migrates to flattened admin

src/app/(payload)/admin/[[...segments]]/page.tsx

@@ -0,0 +1,17 @@
+/* THIS FILE WAS GENERATED AUTOMATICALLY BY PAYLOAD. */
+import config from '@payload-config'
+/* DO NOT MODIFY IT BECAUSE IT COULD BE REWRITTEN AT ANY TIME. */
+import { RootPage } from '@payloadcms/next/views/Root/index'
+
+type Args = {
+  params: {
+    segments: string[]
+  }
+  searchParams: {
+    [key: string]: string | string[]
+  }
+}
+
+const Page = ({ params, searchParams }: Args) => RootPage({ config, params, searchParams })
+
+export default Page