feat(menu): 菜单列表支持排序

- 修改菜单列表查询逻辑，增加排序参数
- 默认按 sort 字段升序排列
- 优化菜单树形结构生成逻辑

plugin/piadmin/app/service/MenuService.php

@@ -24,7 +24,7 @@ class MenuService extends BaseService
     public function getMenuList($params = [])
     {
         $where = [];
-        $list = $this->dao->getList($where);
+        $list = $this->dao->getList($where, '*', 0, 0, 'sort asc');
         return TreeUtils::toTree($list);
     }