[Feature]:  希望Cascader 级联选择 支持多选

### What problem does this feature solve

城市多选，兴趣爱好多选等等

### What does the proposed API look like

https://element.eleme.io/#/zh-CN/component/cascader#duo-xuan

https://devui.design/components/zh-cn/cascader/demo#multiple-cascader