table组件的列宽为什么不能像react版那样可以拖拽调整呢？

- [ ] 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?
用户体验更友好

### What does the proposed API look like?
都行