updated nextjs example with app router

examples/nextjs/src/app/admin/[[...admin]]/page.tsx

@@ -0,0 +1,18 @@
+import { Admin } from "bknd/ui";
+import "bknd/dist/styles.css";
+import { getApi } from "@/bknd";
+
+export default async function AdminPage() {
+   const api = await getApi({ verify: true });
+
+   return (
+      <Admin
+         withProvider={{ user: api.getUser() }}
+         config={{
+            basepath: "/admin",
+            logo_return_path: "/../",
+            color_scheme: "system",
+         }}
+      />
+   );
+}