feat(main.js): emit appLoaded event via eventbus once the app is loaded

src/main.js

@@ -11,6 +11,7 @@ let appLoader = new AppLoader()
 appLoader.loadApp(AppRootComponent, '#app', '<App/>').then(vueInstance => {
   main.vueInstance = vueInstance
   main.vueInstance.appHooks.loadRegisteredHooks()
+  main.vueInstance.eventBus.$emit('appLoaded')
   main.vueInstance.appHooks.run('appLoaded', main.vueInstance)
 })