Add build workflow for Linux

[fire]

These changes enable automated builds for multiple platforms.

• Looking for review and how to resolve the mac build error.
• Upload the proper build rather than the entire build folder
• Only build for Linux
• Can submit only [windows, linux] for now
• Build for windows from linux

[fire]

See the actions on https://github.com/fire/CoACD

[eliphatfs]

Thanks for the work on setting up CI for CoACD!
We will merge the pull request after checking the code.
It would be great if you could also include building pip wheels in the actions.

[fire]

I agree, but I am wanting to do it in a secondary pr for python pip.

[fire]

Doing windows c++ executable and macos executable caused me to be stuck for most of today so don't think they're easy to do, but I wanted some progress.

I don't think I can figure out how to do Windows or MacOS today. Catch you all another time. I'll still be avaliable for fixing the linux actions though.