Add mame-essentials as package

mame-essentials/PKGBUILD

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+pkgname=mame-essentials
+pkgver=1.0
+pkgrel=0
+pkgdesc="MAME Essentials MSYS2 package"
+arch=('x86_64')
+depends=('make' 'wget' 'git' 'p7zip' 'mingw-w64-x86_64-gcc' 'mingw-w64-x86_64-python' 'mingw-w64-i686-gcc' 'mingw-w64-i686-python')
+url="https://github.com/mamedev/buildtools/"
+license=('none')
+options=('!strip')
+package() {
+	cp -R "$srcdir/." "$pkgdir/."
+}

mame-essentials/README.md

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+# MAME Essentials package
+
+Build with:
+
+```
+makepkg -f -d
+```
+
+options:
+f - is for force (to recreate if package file already exits)
+d - no dependency check (so no need to have deps already preinstalled)
+
+
+To use:
+
+```
+pacman -U mame-essentials-1.0-0-x86_64.pkg.tar.zst
+```
+
+Will install this package and all dependencies needed for user to have installed to be able to compile MAME.
+This can be installed on vanilla MSYS2 installation.
+

mame-essentials/src/opt/mamedev/aliases

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+gl=git log --oneline --all --graph --decorate  $*
+ls=ls --color $*
+pwd=cd
+clear=cls

mame-essentials/src/opt/mamedev/config32.bat

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+@set CONFIG_ARCHITECTURE=x86
+@env.bat

mame-essentials/src/opt/mamedev/config64.bat

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+@set CONFIG_ARCHITECTURE=x64
+@env.bat

mame-essentials/src/opt/mamedev/env.bat

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+:: Find root dir
+@if not defined MSYS2_ROOT (
+    for /f %%i in ("%~dp0\..\..") do @set MSYS2_ROOT=%%~fi
+)
+
+:: Add aliases
+@doskey /macrofile="%MSYS2_ROOT%\opt\mamedev\aliases"
+
+@set MINGW32=
+@set MINGW64=
+@set ADD_PATH=
+@set PATH=%windir%\System32;%windir%
+:: Enhance Path
+@if "%CONFIG_ARCHITECTURE%"=="x86" (
+	@set MINGW32=/mingw32
+	@set PYTHON_EXECUTABLE=/mingw32/bin/python.exe
+	@set MINGW=%MSYS2_ROOT%\mingw32
+	@set prompt=[MINGW32] $p$g
+) else (
+	@set MINGW64=/mingw64
+	@set PYTHON_EXECUTABLE=/mingw64/bin/python.exe
+	@set MINGW=%MSYS2_ROOT%\mingw64
+	@set prompt=[MINGW64] $p$g
+)
+@set MINGW_PATH=%MINGW%\bin
+
+@set PATH=%ADD_PATH%;%MSYS2_ROOT%\opt\mamedev;%MINGW_PATH%;%MSYS2_ROOT%\usr\bin;%PATH%
+
+@if not exist "%MSYS2_ROOT%\home" (
+	@bash --login /dev/null
+)

mame-essentials/src/win32env.bat

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+@if not exist src (
+	mkdir src
+)
+@cd src
+@cmd /k ..\opt\mamedev\env.bat