组件n-image-group添加to属性

[zsjbsn]

Clear and concise description of the problem

类似其他组件一样添加to属性，这样即使HTMLElement全屏的时候，n-image-group也能正常显示，不会被全屏元素遮挡。

Suggested solution

组件n-image-group添加to属性

Alternative

No response

Additional context

No response

Validations

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