chore: init theme (#14508)

* chore: init theme

* chore: update faas config

examples/components/theme-configurator/loading.vue

@@ -0,0 +1,35 @@
+<style>
+  .loadingClass {
+    z-index: 0!important;
+    .el-loading-spinner {
+      top: 0%;
+      margin-top: 30%;
+    }
+  }
+</style>
+<script>
+
+import bus from '../../bus.js';
+import './progress.js';
+
+export default {
+  data() {
+    return {
+      count: 0
+    };
+  },
+  created() {
+    bus.$on('user-theme-config-loading', val => {
+      if (val) {
+        this.count++;
+        if (this.count > 1) return;
+        this.$bar.start();
+      } else {
+        this.count--;
+        if (this.count) return;
+        this.$bar.finish();
+      }
+    });
+  }
+};
+</script>