refactor(webui): use @vue/cli to bootstrap new ui

webui/src/main.js

@@ -0,0 +1,12 @@
+import Vue from "vue";
+import App from "./App.vue";
+import router from "./router";
+import store from "./store";
+
+Vue.config.productionTip = false;
+
+new Vue({
+  router,
+  store,
+  render: h => h(App)
+}).$mount("#app");