docs(router): Move ActivatedRoute example to mini-app (#29755)

PR Close #29755

packages/examples/router/activated-route/main.ts

@@ -0,0 +1,12 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
+import {platformBrowserDynamic} from '@angular/platform-browser-dynamic';
+import {AppModuleNgFactory} from './module.ngfactory';
+
+platformBrowserDynamic().bootstrapModuleFactory(AppModuleNgFactory);