Add US/GiteaPanel (#122)

A Gitea shortcut panel built based on UserScript.

Reviewed-on: https://gitea.com/gitea/awesome-gitea/pulls/122
Co-authored-by: kerwin612 <kerwin612@noreply.gitea.com>
Co-committed-by: kerwin612 <kerwin612@noreply.gitea.com>

README.md

@@ -83,6 +83,7 @@ A curated list of awesome projects related to Gitea.
 
 - [GiteaPanel](https://github.com/sashaoli/GiteaPanel) - Manage the local Gitea server from the tray.
 - [Listea](https://github.com/IGLOU-EU/listea) - Simple Gitea issues viewer from the tray.
+- [US/GiteaPanel](https://github.com/kerwin612/us-giteapanel) - A Gitea shortcut panel built based on UserScript.
 
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