Refer to other comment systems for UI

[hsluoyz]

See the full list: https://github.com/topics/comment-system?o=desc&s=stars

Another list: https://lisakov.com/projects/open-source-comments/

• https://remark42.com/demo/

• https://valine.js.org/

• https://twikoo.js.org/

• https://giscus.app/

• https://artalk.js.org/

[hsluoyz]

@Kininaru