asset dump / update bundle icons

resources/bundle preview image template/mega skinpack bundle/make_preview.bat

@@ -0,0 +1,21 @@
+@echo off
+setlocal
+set "HERE=%~dp0"
+set "HERE=%HERE:~0,-1%"
+set "REPO=%HERE%\..\..\.."
+where python >nul 2>nul
+if %errorlevel%==0 (
+  set "PY=python"
+) else (
+  set "PY=py -3"
+)
+%PY% "%REPO%\scripts\make_bundle_preview.py" --bundle-dir "%HERE%"
+if errorlevel 1 (
+  echo.
+  echo Failed.
+  pause
+  exit /b 1
+)
+echo.
+echo Created "%HERE%\preview.png"
+pause