有没有考虑过响应式布局

### Feature Description

通过flex等方式实现响应式布局，不需要对画布进行缩放

### Possible Implementation

`maliang.Tk(... , flex=True)`
`maliang.Flex(cv, (10,10), childs=[maliang.Text() , ...])`

### Contact Details

_No response_

### Code of Conduct

- [x] I agree to follow this project's Code of Conduct