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/org_user_access.ps1

@@ -0,0 +1,35 @@
+# Revoke or grant a user's access across all repos in an organization
+# Uses collaborator API - only affects repos where user is direct collaborator
+
+param(
+    [string]$ApiToken = $env:GITEA_TOKEN,
+    [string]$GiteaBaseUrl = "http://afe.git:3000",
+    [string]$Org,
+    [string]$Username,
+    [ValidateSet("revoke", "read", "write")]
+    [string]$Action = "revoke"
+)
+
+$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 $Org -or -not $Username) { Write-Host "Error: Org, Username required"; exit 1 }
+
+$ScriptDir = Split-Path -Parent $MyInvocation.MyCommand.Path
+$Repos = @(& "$ScriptDir\list_orgs_repos.ps1" -ApiToken $ApiToken -GiteaBaseUrl $GiteaBaseUrl -Action list-repos -Org $Org)
+$UserScript = Join-Path $ScriptDir "user_permission.ps1"
+
+$count = 0
+foreach ($Repo in $Repos) {
+    if (-not $Repo) { continue }
+    Write-Host "Processing $Org/$Repo..."
+    $null = & $UserScript -ApiToken $ApiToken -GiteaBaseUrl $GiteaBaseUrl -Owner $Org -Repo $Repo -Username $Username -Action $Action 2>&1
+    if ($LASTEXITCODE -eq 0) { $count++ }
+}
+Write-Host "Done. Updated $count repos where $Username was collaborator."
+Write-Host "Note: Org repos may use team permissions. Check org teams for full control."