docs(aio): ward's changes

aio/content/examples/docs-style-guide/src/app/hero.ts

@@ -0,0 +1,11 @@
+export class Hero {
+  id: number;
+  name: string;
+}
+
+export const HEROES: Hero[] = [
+  { id: 11, name: 'Mr. Nice' },
+  { id: 12, name: 'Narco' },
+  { id: 13, name: 'Bombasto' },
+  { id: 14, name: 'Celeritas' }
+];