Use ngModel from @angular/forms for HelloWorldComponent

Author: gregmagolan

src/hello-world/BUILD.bazel

@@ -24,6 +24,7 @@ ng_module(
     deps = [
         "//src/lib",
         "@angular//packages/core",
+        "@angular//packages/forms",
         "@rxjs",
     ],
 )

src/hello-world/hello-world.component.html

@@ -2,4 +2,4 @@ <h1>Home</h1>
 
 <div>Hello {{ name }}</div>
 
-<input type="text" [value]="name" (input)="name = $event.target.value"/>
+<input type="text" [(ngModel)]="name"/>

src/hello-world/hello-world.module.ts

@@ -1,9 +1,11 @@
 import {NgModule} from '@angular/core';
+import {FormsModule} from '@angular/forms';
 
 import {HelloWorldComponent} from './hello-world.component';
 
 @NgModule({
   declarations: [HelloWorldComponent],
+  imports: [FormsModule],
   exports: [HelloWorldComponent],
 })
 export class HelloWorldModule {