feat: 更新 formkit 配置，优化插件结构并修改按钮点击事件逻辑

src/all-custom/all-custom.vue

@@ -105,7 +105,7 @@ async function submit(formData: Record<string, any>, formNode: FormKitNode) {
         label="Button"
         @click="() => {
           value!.button = value!.button || {};
-          (value!.button as any).clicked = 'clicked';
+          (value!.button as any).clicked = 'clicked-这个值在@submit回调的formData里不会出现';
           (value!.group as any)['text-in-group-1'] = 'changed-by-button';
         }"
       />