Add update script and enhance cropping offset display with center/right columns

Update-Video-Processing-Scripts.cmd

@@ -0,0 +1,52 @@
+@echo off
+setlocal
+
+set "REPO_URL=https://git.gurusushi.dyndns.org/guru/Video-Processing-Scripts.git"
+set "BRANCH=main"
+set "SCRIPT_DIR=%~dp0"
+
+cd /d "%SCRIPT_DIR%"
+if errorlevel 1 (
+    echo Failed to change directory to %SCRIPT_DIR%
+    exit /b 1
+)
+
+where git >nul 2>&1
+if errorlevel 1 (
+    echo Error: git is not installed or not in PATH.
+    exit /b 1
+)
+
+if exist ".git" (
+    echo Updating existing repository in %SCRIPT_DIR%
+    git remote set-url origin "%REPO_URL%"
+    if errorlevel 1 (
+        echo git remote set-url failed.
+        exit /b 1
+    )
+    git fetch origin %BRANCH%
+    if errorlevel 1 (
+        echo git fetch failed.
+        exit /b 1
+    )
+    git checkout %BRANCH%
+    if errorlevel 1 (
+        echo git checkout failed.
+        exit /b 1
+    )
+    git pull --ff-only origin %BRANCH%
+    if errorlevel 1 (
+        echo git pull failed.
+        exit /b 1
+    )
+) else (
+    echo Cloning repository into %SCRIPT_DIR%
+    git clone --branch %BRANCH% "%REPO_URL%" .
+    if errorlevel 1 (
+        echo git clone failed.
+        exit /b 1
+    )
+)
+
+echo Done.
+endlocal