test(angular): add ng19 test app (#30041)

Issue number: internal

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## What is the current behavior?
There are tests apps for Angular 16, 17 and 18

## What is the new behavior?
Adds a test app for Angular 19

## Does this introduce a breaking change?

- [ ] Yes
- [x] No

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Co-authored-by: Brandy Carney <6577830+brandyscarney@users.noreply.github.com>

packages/angular/test/base/src/main-standalone.ts

@@ -2,12 +2,12 @@ import { bootstrapApplication } from '@angular/platform-browser';
 import { RouteReuseStrategy, provideRouter } from '@angular/router';
 import { provideIonicAngular, IonicRouteStrategy } from '@ionic/angular/standalone';
 
-import { AppComponentStandalone } from './app/app-standalone.component';
+import { AppStandaloneComponent } from './app/app-standalone.component';
 
 import { routes } from './app/app.routes';
 
 export const bootstrapStandalone = () => {
-  bootstrapApplication(AppComponentStandalone, {
+  bootstrapApplication(AppStandaloneComponent, {
     providers: [
       { provide: RouteReuseStrategy, useClass: IonicRouteStrategy },
       provideRouter(routes),