build: add files of vant-cli 2

packages/vant-cli/site/mobile/main.js

@@ -0,0 +1,30 @@
+import Vue from 'vue';
+import VueRouter from 'vue-router';
+import DemoBlock from './components/DemoBlock';
+import DemoSection from './components/DemoSection';
+import routes from './router';
+import App from './App';
+import '@vant/touch-emulator';
+import '../common/iframe-router';
+
+Vue.use(VueRouter);
+Vue.component(DemoBlock.name, DemoBlock);
+Vue.component(DemoSection.name, DemoSection);
+
+const router = new VueRouter({
+  mode: 'hash',
+  routes,
+  scrollBehavior: (to, from, savedPosition) => savedPosition || { x: 0, y: 0 }
+});
+
+router.afterEach(() => {
+  Vue.nextTick(window.syncPath);
+});
+
+window.vueRouter = router;
+
+new Vue({
+  el: '#app',
+  render: h => h(App),
+  router
+});