Add Windows CMD script

git-mirror-zip.bat

@@ -0,0 +1,30 @@
+@echo off
+setlocal enabledelayedexpansion
+:: Clone a git repo as a full mirror and pack it into a zip archive.
+:: Works on Windows (PowerShell 5.0+).
+
+if "%~1"=="" (
+  echo Usage: %~nx0 ^<git-repo-url^> [output.zip]
+  exit /b 1
+)
+
+set "URL=%~1"
+set "OUT=%~2"
+if "!OUT!"=="" set "OUT=repo.zip"
+set "WORK_DIR=.tmp_git_mirror"
+
+echo [1/3] Cloning mirror of %URL% ...
+git clone --mirror "%URL%" "%WORK_DIR%"
+if errorlevel 1 (
+  echo Git clone failed.
+  rmdir /s /q "%WORK_DIR%" >nul 2>&1
+  exit /b 1
+)
+
+echo [2/3] Creating %OUT% with maximum compression ...
+powershell -NoProfile -Command ^
+  "Compress-Archive -Path '%WORK_DIR%\*' -DestinationPath '%OUT%' -CompressionLevel Optimal -Force"
+
+echo [3/3] Done: %OUT%
+
+rmdir /s /q "%WORK_DIR%" >nul 2>&1