feature(platform): implement a web component that provides access to a small subset of platform information

packages/angular/src/index.ts

@@ -24,6 +24,7 @@ export { MenuController } from './providers/menu-controller';
 export { ModalController, ModalProxy } from './providers/modal-controller';
 export { NavController } from './providers/nav-controller';
 export { NavParams } from './providers/nav-params';
+export { Platform } from './providers/platform';
 export { PopoverController, PopoverProxy } from './providers/popover-controller';
 export { ToastController, ToastProxy } from './providers/toast-controller';