Add game launcher configuration

[ruthan]

Hello, game window is really tiny on highres monitors as mine. Something like simple integer filter to multiple (double/triple) application size would be nicer, later you can even add some clever graphics smoothing options..

Technically it should be quite simple for double size draw 2x2/3x3 pixels instead of every single pixel, i dont thing that you need to struggle with some in build Java inbuild zooming or drawing options.

[DjThunder]

Until next release, you can try this: https://github.com/b3dgs/lionheart-remake/wiki/UserManual#properties (Modify properties for custom output resolution)

[DjThunder]