chore: add prettier (2/3): apply formatting, re-enable lint ci step (#6682)

* style: apply prettier formatting

* fix: re-enable lint ci check

example/simpleVuePlugin/HelloWorld.vue

@@ -1,14 +1,14 @@
 <template>
-<div class="example">{{ msg }}</div>
+  <div class="example">{{ msg }}</div>
 </template>
 
 <script>
 export default {
-    data() {
-        return {
-            msg: 'Hello world!'
-        };
-    }
+  data() {
+    return {
+      msg: 'Hello world!'
+    };
+  }
 };
 </script>