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/scripts/user_permission.ps1

@@ -0,0 +1,45 @@
+# Add, update, or revoke user permission on a repository
+
+param(
+    [string]$ApiToken = $env:GITEA_TOKEN,
+    [string]$GiteaBaseUrl = "http://afe.git:3000",
+    [string]$Owner,
+    [string]$Repo,
+    [string]$Username,
+    [ValidateSet("read", "write", "admin", "revoke")]
+    [string]$Action = "read"
+)
+
+$ErrorActionPreference = "Stop"
+$ConfigPath = Join-Path (Split-Path -Parent $MyInvocation.MyCommand.Path) "..\config.local.json"
+if (-not $ApiToken -and (Test-Path $ConfigPath)) {
+    $cfg = Get-Content $ConfigPath -Raw | ConvertFrom-Json
+    $ApiToken = $cfg.ApiToken
+    if ($cfg.GiteaBaseUrl) { $GiteaBaseUrl = $cfg.GiteaBaseUrl }
+}
+if (-not $ApiToken) { Write-Host "Error: ApiToken required"; exit 1 }
+if (-not $Owner -or -not $Repo -or -not $Username) { Write-Host "Error: Owner, Repo, Username required"; exit 1 }
+
+$ApiBase = "$GiteaBaseUrl/api/v1"
+$ReposPath = "repos/$Owner/$Repo"
+$Headers = @{ "Authorization" = "token $ApiToken"; "Content-Type" = "application/json" }
+
+if ($Action -eq "revoke") {
+    try {
+        Invoke-RestMethod -Uri "$ApiBase/$ReposPath/collaborators/$Username" -Headers $Headers -Method Delete
+        Write-Host "Revoked $Username from $Owner/$Repo"
+    } catch {
+        if ($_.Exception.Response.StatusCode -eq 404) { Write-Host "User not a collaborator or repo not found" }
+        else { throw }
+    }
+    exit 0
+}
+
+$Body = @{ permission = $Action } | ConvertTo-Json
+try {
+    Invoke-RestMethod -Uri "$ApiBase/$ReposPath/collaborators/$Username" -Headers $Headers -Method Put -Body $Body
+    Write-Host "Set $Username to $Action on $Owner/$Repo"
+} catch {
+    Write-Host "FAIL: $($_.Exception.Message)"
+    exit 1
+}