feat(git-control): add branch compare (main/uat/prod), org/single repo support

Made-with: Cursor

skills/git-control/references/gitea_api.md

@@ -53,3 +53,11 @@ Auth: `Authorization: token {ApiToken}`
 | Remove member | DELETE | `/teams/{id}/members/{username}` |
 
 Team permission: `permission` = "none"|"read"|"write"|"admin"|"owner"
+
+## Branch Compare
+
+| Action | Method | Path |
+|--------|--------|------|
+| Compare | GET | `/repos/{owner}/{repo}/compare/{base}...{head}` |
+
+Returns commits in `head` that are not in `base`. Use `base...head` (three dots) format.