docs(aio): add NgModule docs (#20306)

PR Close #20306

aio/content/examples/ngmodule-faq/src/main-static.ts

@@ -0,0 +1,13 @@
+// #docplaster
+/*
+// #docregion
+// The browser platform without a compiler
+import { platformBrowser } from '@angular/platform-browser';
+
+// The app module factory produced by the static offline compiler
+import { AppModuleNgFactory } from './app/app.module.ngfactory';
+
+// Launch with the app module factory.
+platformBrowser().bootstrapModuleFactory(AppModuleNgFactory);
+// #enddocregion
+*/