[RangePicker]展示的日期范围可以用slot来自定义么

[appleqzw]

• I have searched the issues of this repository and believe that this is not a duplicate.

What problem does this feature solve?

比如我点击了预设范围里的过去7天，我希望日期框显示的是"过去7天"这4个字，而不是过去7天对应的YYYY-MM-DD - YYYY-MM-DD

What does the proposed API look like?

以slot的形式支持

[appleqzw]

另外我应该如何区分是点击的预设选项还是手动点击的面板里的日期？