* feat: Menu.Item support icon
* docs: update menu item usage
* docs: remove span wrap,when use icon
* fix: Collapsed depends on the span
* ✅ fix demo snapshot
* do not wrap children when it is span
* Menu.SubMenu support icon prop
* fix sub menu title
* fix eslint
* update dropdown demo
* fix extra icon attribute on li
Co-authored-by: MengZhaoFly <1424254461@qq.com>