Add deeplink store sample (#1698)

* Adds deeplink store app

* push

* update md

* update

deeplink_store_example/lib/main.dart

@@ -0,0 +1,43 @@
+// Copyright 2019 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import 'package:flutter/material.dart';
+import 'package:go_router/go_router.dart';
+
+import 'product_category_list.dart';
+import 'product_list.dart';
+import 'product_details.dart';
+
+void main() => runApp(const MyApp());
+
+class MyApp extends StatelessWidget {
+  const MyApp({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp.router(
+      debugShowCheckedModeBanner: false,
+      routerConfig: GoRouter(
+        routes: [
+          GoRoute(path: '/', builder: (_, __) => const ProductList(),
+            routes: [
+              GoRoute(path: ':id', builder: (_, __) => const ProductDetails()),
+            ],
+          ),
+          GoRoute(path: '/category/:category', builder: (_, __) => const ProductCategoryList()),
+        ],
+      ),
+    );
+  }
+}