Feature request: hiding (instead of editing/deleting) existing comment

## Describe the Feature

Being able to hide comments matching a regex, as an alternative to `delete-comment-regex` (or `edit-comment-regex` added in #26).

## Expected Behavior

Hiding existing comments, for example by using a `hide-comment-regex`.

## Use Case

Sometimes keeping old comments might make sense for historical/compliance reasons.

## Describe Ideal Solution

Not sure, open for thoughts.

## Alternatives Considered

1. `delete-comment-regex`
2. `edit-comment-regex` (added in #26)

But they don't keep the history in an equally accessible way.

## Additional Context

...

首先跟踪现有的 `delete-comment-regex` 和 `edit-comment-regex` 行为，然后查看 GitHub API 对隐藏评论的支持。定义命令接口和可见性语义，包括权限和历史访问；完成的标准是能够隐藏匹配的现有评论，而不删除或编辑它们。

由索引模型根据 Issue 内容生成。