feat(git-control): add Git repository and branch access control features

- Introduced new scripts for managing Gitea repository permissions, including branch protection, user access, and organization-wide settings.
- Added documentation for the git-control skill, detailing API usage and capabilities.
- Included .gitignore to prevent committing sensitive configuration files.
- Created references for Gitea API endpoints related to branch protection and user permissions.

skills/git-control/references/gitea_api.md

@@ -0,0 +1,55 @@
+# Gitea API Reference for Git Control
+
+Base: `{GiteaBaseUrl}/api/v1`  
+Auth: `Authorization: token {ApiToken}`
+
+## Branch Protection
+
+| Action | Method | Path |
+|--------|--------|------|
+| List | GET | `/repos/{owner}/{repo}/branch_protections` |
+| Create | POST | `/repos/{owner}/{repo}/branch_protections` |
+| Get | GET | `/repos/{owner}/{repo}/branch_protections/{name}` |
+| Edit | PATCH | `/repos/{owner}/{repo}/branch_protections/{name}` |
+| Delete | DELETE | `/repos/{owner}/{repo}/branch_protections/{name}` |
+
+**CreateBranchProtectionOption** (POST body):
+- `branch_name`: pattern (e.g. `uat`, `main`)
+- `enable_push`: false = no direct push
+- `enable_merge_whitelist`: true + empty lists = no one can merge
+- `merge_whitelist_usernames`: []
+- `merge_whitelist_teams`: []
+
+## Organizations & Repositories
+
+| Action | Method | Path | Note |
+|--------|--------|------|------|
+| List all orgs | GET | `/admin/orgs` | Admin only |
+| List org repos | GET | `/orgs/{org}/repos` | Pagination: page, limit |
+| List user repos | GET | `/user/repos` | Current user |
+| Search repos | GET | `/repos/search` | q, page, limit |
+
+## Collaborators (User Repo Permissions)
+
+| Action | Method | Path |
+|--------|--------|------|
+| List | GET | `/repos/{owner}/{repo}/collaborators` |
+| Add/Update | PUT | `/repos/{owner}/{repo}/collaborators/{username}` |
+| Remove | DELETE | `/repos/{owner}/{repo}/collaborators/{username}` |
+| Check | GET | `/repos/{owner}/{repo}/collaborators/{username}` |
+
+**PUT body**: `{"permission": "read"|"write"|"admin"}`
+
+## Organization Teams (Org-level Permissions)
+
+| Action | Method | Path |
+|--------|--------|------|
+| List org teams | GET | `/orgs/{org}/teams` |
+| List team repos | GET | `/teams/{id}/repos` |
+| Add repo to team | PUT | `/teams/{id}/repos/{org}/{repo}` |
+| Remove repo from team | DELETE | `/teams/{id}/repos/{org}/{repo}` |
+| List team members | GET | `/teams/{id}/members` |
+| Add member | PUT | `/teams/{id}/members/{username}` |
+| Remove member | DELETE | `/teams/{id}/members/{username}` |
+
+Team permission: `permission` = "none"|"read"|"write"|"admin"|"owner"