feat(doc): move ngfor enhanvement

apps/angular/ngfor-enhancement/src/app/app.component.ts

@@ -0,0 +1,25 @@
+import { NgFor, NgIf } from '@angular/common';
+import { ChangeDetectionStrategy, Component } from '@angular/core';
+
+interface Person {
+  name: string;
+}
+
+@Component({
+  standalone: true,
+  imports: [NgFor, NgIf],
+  selector: 'app-root',
+  template: `
+    <ng-container *ngIf="persons.length > 0; else emptyList">
+      <div *ngFor="let person of persons">
+        {{ person.name }}
+      </div>
+    </ng-container>
+    <ng-template #emptyList>The list is empty !!</ng-template>
+  `,
+  styles: [],
+  changeDetection: ChangeDetectionStrategy.OnPush,
+})
+export class AppComponent {
+  persons: Person[] = [];
+}