macOS Game Mode Support for 2Ship2Harkinian

[larsy1995]

Adds the necessary changes by Archez and me to the packaging-2.cmake and info.plist files that will allow Game Mode support in 2Ship2Harkinian.
Should not be merged until https://github.com/Kenix3/libultraship/pull/690 gets merged into 2Ship2Harkinian.

Build Artifacts

• 2ship-linux.zip
• 2ship-mac.zip
• 2ship-windows.zip

[larsy1995]

Moved the directory & file creation and existence logic out of ship and into port.

[larsy1995]

This should be able to be merged as well. Will look at that conflict later. LUS already has my PR merged, so that is fine.

[larsy1995]

Nvm, it has not been updated in 2Ship. Will have to wait for LUS to be bumped then.

[larsy1995]

Unless I have done something weird while updating my code, this should have the newer version of the game mode implementation that Archez added to SoH. And should probably be fine to merge now that LUS has been bumped for real this time.

[Archez]

otool -L output looks good

2ship-mac/2s2h.app/Contents/MacOS/2s2h:
	@executable_path/../Frameworks/libSDL2-2.0.0.dylib (compatibility version 3001.0.0, current version 3001.12.0)
	@executable_path/../Frameworks/libz.1.dylib (compatibility version 1.0.0, current version 1.3.1)
	@executable_path/../Frameworks/libbz2.1.0.dylib (compatibility version 1.0.0, current version 1.0.8)
	@executable_path/../Frameworks/libGLEW.2.2.0.dylib (compatibility version 2.2.0, current version 2.2.0)
	/System/Library/Frameworks/OpenGL.framework/Versions/A/OpenGL (compatibility version 1.0.0, current version 1.0.0)
	@executable_path/../Frameworks/libzip.5.dylib (compatibility version 6.0.0, current version 6.5.0)
	@executable_path/../Frameworks/libtinyxml2.10.dylib (compatibility version 10.0.0, current version 10.0.0)
	/System/Library/Frameworks/Foundation.framework/Versions/C/Foundation (compatibility version 300.0.0, current version 2503.1.0)
	/System/Library/Frameworks/AVFoundation.framework/Versions/A/AVFoundation (compatibility version 1.0.0, current version 2.0.0)
	/System/Library/Frameworks/Metal.framework/Versions/A/Metal (compatibility version 1.0.0, current version 343.19.0)
	/System/Library/Frameworks/QuartzCore.framework/Versions/A/QuartzCore (compatibility version 1.2.0, current version 1.11.0)
	@executable_path/../Frameworks/libpng16.16.dylib (compatibility version 62.0.0, current version 62.0.0)
	/usr/lib/libc++.1.dylib (compatibility version 1.0.0, current version 1700.255.5)
	/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1345.120.2)
	/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation (compatibility version 150.0.0, current version 2503.1.0)
	/usr/lib/libobjc.A.dylib (compatibility version 1.0.0, current version 228.0.0)