Compile for Debian Linux with GCC

[bramtechs]

The following PR applies the following to work on Linux:

• exceptions use the baseclass std::runtime_error so they are C++ standard compliant and cross-platform.
• change premake5.lua to link with the libsafec library (available in apt) to enable extended C11 safety functions
  (why isn't this in the standard library? Idk, GNU hates safety or something.)
• updates macros in core.h to use gcc and clang visibility attributes
• put apt command inside of readme

After installing Debian distro with WSL2

sudo apt install build-essential libsafec-dev
premake5 gmake
make
cd sandbox
../bin/debug-linux-x86_64/x64/sandbox/sandbox

[lolrobbe2]

will take into account but Athena is being redesigned for use in OpenEAW and allot of breaking changes will be made as it will be fully multithreaded and streamlined

[lolrobbe2]

@bramtechs are you using premake tools

[bramtechs]

@bramtechs are you using premake tools

Haven't tried it. I did everything through cli and emacs.