- [x] I have searched the [issues](https://github.com/vueComponent/ant-design-vue/issues) of this repository and believe that this is not a duplicate. ### What problem does this feature solve? In the current children scops, there's no way to introduce row selection just for the children and not for the whole table ### What does the proposed API look like? Allow scoping row selections  <!-- generated by issue-helper. DO NOT REMOVE -->