feat(components): add a tree view page

src/app/pages/components/components-routing.module.ts

@@ -0,0 +1,25 @@
+import { NgModule } from '@angular/core';
+import { Routes, RouterModule } from '@angular/router';
+
+import { ComponentsComponent } from './components.component';
+import { TreeComponent } from './tree/tree.component';
+
+const routes: Routes = [{
+  path: '',
+  component: ComponentsComponent,
+  children: [{
+    path: 'tree',
+    component: TreeComponent,
+  }],
+}];
+
+@NgModule({
+  imports: [RouterModule.forChild(routes)],
+  exports: [RouterModule],
+})
+export class ComponentsRoutingModule { }
+
+export const routedComponents = [
+  ComponentsComponent,
+  TreeComponent,
+];