产品分类列表(树形)

{
    "code": 200,
    "message": "success",
    "data": [
        {
            "id": 1,
            "pid": 0,
            "game_id": 1,
            "code": "currency",
            "name": "货币",
            "icon": "",
            "sort": 0,
            "children": [
                {
                    "id": 2,
                    "pid": 1,
                    "game_id": 1,
                    "code": "gold",
                    "name": "金币",
                    "icon": "",
                    "sort": 1
                }
            ]
        }
    ]
}