fix(nx-plugin): support migration for Angular v20 app component (#1785)

Author: brandonroberts

packages/nx-plugin/src/generators/init/files/src/main.server.ts__template__

@@ -1,8 +1,14 @@
 import 'zone.js/node';
 import '@angular/platform-server/init';
 import { render } from '@analogjs/router/server';
+<% if (majorAngularVersion > 19) { %>
+import { App } from './app/app';
+import { config } from './app/app.config.server';
 
+export default render(App, config);
+<% } else { %>
 import { AppComponent } from './app/app.component';
 import { config } from './app/app.config.server';
 
 export default render(AppComponent, config);
+<% } %>