implement example

examples/postly/lib/router/app_router.dart

@@ -0,0 +1,12 @@
+import 'package:auto_route/auto_route.dart';
+
+import 'app_router.gr.dart';
+
+@AutoRouterConfig()
+class AppRouter extends $AppRouter {
+  @override
+  List<AutoRoute> get routes => [
+        AutoRoute(page: PostsRoute.page, initial: true),
+        AutoRoute(page: PostDetailsRoute.page),
+      ];
+}