Add gitea-conventional-comments-button (#140)

An open source browser extension to add buttons for conventional comments (https://conventionalcomments.org/) to gitea review comment boxes.

Reviewed-on: https://gitea.com/gitea/awesome-gitea/pulls/140
Reviewed-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: Sebastian Sauer <sauer.sebastian@gmail.com>
Co-committed-by: Sebastian Sauer <sauer.sebastian@gmail.com>

README.md

@@ -153,6 +153,7 @@ A curated list of awesome projects related to Gitea and its soft-fork instances.
 - [redmine_merge_request_links](https://github.com/tf/redmine_merge_request_links#gitea) - Gitea pull request integration for Redmine issue tracker.
 - [Gitea](https://github.com/LeonDevLifeLog/gitea-idea-plugin) plugin for JetBrains IDEs(Idea,Android Studio,etc).
 - [Gitea-Anchorpoint](https://docs.anchorpoint.app/docs/1-overview/integrations/gitea) Gitea integration plugin for an artist friendly Git client.
+- [gitea-conventional-comments-button](https://github.com/sebastian-sauer/gitea-conventional-comments-button) - A browser extension to add buttons for [conventional comments](https://conventionalcomments.org/) to review comment boxes.
 
 ## Scripts