建议增加文件仅显示

### Please make sure of the following things

- [X] I have read the [documentation](https://alist.nn.ci).
- [X] I'm sure there are no duplicate issues or discussions.
- [X] I'm sure this feature is not implemented.
- [X] I'm sure it's a reasonable and popular requirement.

### Description of the feature / 需求描述

元信息里有隐藏功能
但是有的时候想只显示某些后缀的文件，这样比在隐藏里加正则的效果好。

### Suggested solution / 实现思路

在元信息中加一个仅显示，和隐藏一样是正则形式。
优先级：隐藏>仅显示

### Additional context / 附件

_No response_