Add a Github Action that automatically builds the program

[FSX]

See: https://help.github.com/en/actions/automating-your-workflow-with-github-actions

[sandervankasteel]

@FSX is this application targeted towards *BSD or more Linux(-like) environments ? The reason I am asking is because Github Actions currently only support environments;

Windows Server 2019
Ubuntu 18.04
Ubuntu 16.04
macOS Catalina 10.15

If you really want *BSD, I'm afraid you need to start looking into running a Jenkins instance on top of the BSD flavor of your choice.

Source: https://help.github.com/en/actions/automating-your-workflow-with-github-actions/workflow-syntax-for-github-actions#jobsjob_idruns-on

[FSX]

I do run it on DragonFlyBSD, but: - the IRC code is cross-platform, - it supports POSIX and Windows platforms, - GCC and Clang are supported and Linux and BSD platforms. So I don't think that's a problem. Source Hut [1] also an option. It supports OpenBSD and FreeBSD. [1]: https://sourcehut.org/