feat(injectionToken): create new challenge on injectionToken

apps/angular/injection-token/src/app/phone.component.ts

@@ -0,0 +1,13 @@
+import { Component } from '@angular/core';
+import { TimerContainerComponent } from './timer-container.component';
+
+@Component({
+  standalone: true,
+  imports: [TimerContainerComponent],
+  template: `<div class="flex gap-2">
+      Phone Call Timer:
+      <p class="italic">(should be 2000s)</p>
+    </div>
+    <timer-container />`,
+})
+export default class PhoneComponent {}