Cascader 级联选择组件新增单选和多选功能

[1014156094]

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

What problem does this feature solve?

可以完成单选或多选的需求

What does the proposed API look like?

Cascader 级联选择组件新增单选和多选功能，可以参考 https://2x.antdv.com/components/cascader-cn/

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[devilruiniu]

基于ant-design-vue二次封装的级联多选可参考https://blog.csdn.net/isusjjyy/article/details/116423781

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This issue is stale because it has been open 60 days with no activity. Remove stale label or comment or this will be closed in 7 days

[github-actions]

This issue is stale because it has been open 60 days with no activity. Remove stale label or comment or this will be closed in 7 days

[1014156094]

up

[github-actions]

This issue is stale because it has been open 60 days with no activity. Remove stale label or comment or this will be closed in 7 days