希望给n-tree组件加个 单行显示且超出一行显示省略号，鼠标划过弹出提示

[wangxiahui007]

Clear and concise description of the problem

n-tree组件，label 文字超长时希望可以选择换行显示或者不换行显示，不换行显示时 超出文字显示省略号，鼠标划过时弹出提示框提示完整文字

Suggested solution

; line-clamp为最大显示行数

Alternative

No response

Additional context

Validations

• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.

[wangxiahui007]