feat(nx): upgrade nx 20 and angular 19

apps/forms/48-avoid-losing-form-data/src/app/app.component.ts

@@ -3,7 +3,6 @@ import { RouterOutlet } from '@angular/router';
 import { NavComponent } from './ui/nav.component';
 
 @Component({
-  standalone: true,
   imports: [RouterOutlet, NavComponent],
   selector: 'app-root',
   template: `

apps/forms/48-avoid-losing-form-data/src/app/pages/join.component.ts

@@ -2,7 +2,6 @@ import { ChangeDetectionStrategy, Component } from '@angular/core';
 import { FormComponent } from '../ui/form.component';
 
 @Component({
-  standalone: true,
   imports: [FormComponent],
   template: `
     <section class="mx-auto	max-w-screen-sm">

apps/forms/48-avoid-losing-form-data/src/app/ui/form.component.ts

@@ -3,7 +3,6 @@ import { FormBuilder, ReactiveFormsModule, Validators } from '@angular/forms';
 
 @Component({
   selector: 'app-form',
-  standalone: true,
   imports: [ReactiveFormsModule],
   template: `
     <form [formGroup]="form" (ngSubmit)="onSubmit()" class="space-y-4">

apps/forms/48-avoid-losing-form-data/src/app/ui/nav.component.ts

@@ -3,7 +3,6 @@ import { RouterLink, RouterLinkActive } from '@angular/router';
 
 @Component({
   selector: 'app-nav',
-  standalone: true,
   imports: [RouterLink, RouterLinkActive],
   template: `
     <nav