chore: init theme (#14508)

* chore: init theme

* chore: update faas config

examples/components/theme-configurator/editor/simpleText.vue

@@ -0,0 +1,38 @@
+<template>
+  <section class="config" :key="displayName">
+    <div class="config-label">
+      {{displayName}}
+    </div>
+    <div class="config-content">
+      <theme-input 
+        :val="value"
+        @change="onChange"
+      ></theme-input>
+    </div>
+  </section>
+</template>
+
+<script>
+import Input from './input';
+import Mixin from './mixin';
+
+export default {
+  components: {
+    themeInput: Input
+  },
+  data() {
+    return {
+      value: ''
+    };
+  },
+  mixins: [Mixin],
+  watch: {
+    'mergedValue': {
+      immediate: true,
+      handler(value) {
+        this.value = this.mergedValue;
+      }
+    }
+  }
+};
+</script>