.github: use MSYS2 to build level-editor
.github: use MSYS2 to build level-editor

mikymod/crown,galek/crown,galek/crown,dbartolini/crown,mikymod/crown,mikymod/crown,dbartolini/crown,dbartolini/crown,galek/crown,mikymod/crown,galek/crown,dbartolini/crown