feat(nx): upgrade nx 20 and angular 19

apps/testing/19-input-output/src/app/app.component.ts

@@ -2,7 +2,6 @@ import { Component } from '@angular/core';
 import { CounterComponent } from './counter.component';
 
 @Component({
-  standalone: true,
   imports: [CounterComponent],
   selector: 'app-root',
   template: `

apps/testing/19-input-output/src/app/counter.component.ts

@@ -11,7 +11,6 @@ import { ComponentStore } from '@ngrx/component-store';
 
 @Component({
   selector: 'app-counter',
-  standalone: true,
   imports: [AsyncPipe, LetDirective],
   template: `
     <ng-container *ngrxLet="counter$ as counter">