Compile fixes for POSIX/MSYS2 Unix-like systems lua5.4 SDL1/2 GL=1/2/3

[jopadan]

CHANGES

• add forsaken.sh with luasocket preload
• reduce multiple VECTOR structs
• remove scripts/socket*
• remove useless executable permissions
• make forsaken-data a submodule in data
• create missing dirs and adapt ignores for content
• adapt to enet changes
• switch to lua5.4
• fix GL2/3 compile and ortho HUD render closing oct2.c: bool Our_CalculateFrameRate(): not working OSD/HUD void DrawSimplePanel(): working OSD/HUD #312
• remove USASM platform dependent sections
• fix SDL1/2 compile
• fix in game HUD info/fps render
• use GL=3 with SDL=1 as default
• use RGB and RGBA where appropriate
• add sound_init to AppInit
• update README.md and remove vs10 README

TODO

• fix sdl2 input
• fix last level fishy menu selection exits game #315
• update dependencies action script sonarqube
• add sound/music flac support

[rpreen]

There are just too many changes to review and merge in one PR here.

PRs need to be small and linked to specific issues to help us discuss and understand the changes.

[jopadan]

Separated the chmod a-x * and removed the subdmodule forsaken-data now and recreated the PR as #316