#### What type of PR is this?
/area ui
/kind feature
/milestone 2.21.x
#### What this PR does / why we need it:
Comments now support rich text format display.
Still need to:
1. Test for XSS vulnerabilities
2. Optimize content styling
3. Editor
#### Which issue(s) this PR fixes:
Fixes https://github.com/halo-dev/halo/issues/7671
#### Special notes for your reviewer:
#### Does this PR introduce a user-facing change?
```release-note
评论内容支持以富文本格式显示
```
Ryan Wang