added RGFW example

[ColleagueRiley]

RGFW example.

This is a miniaudio example too.

The example is based on the SDL example so the MIDI code doesn't support Linux. I plan on updating the example to support cross-compatibility.

[Daivuk]

Hi @ColleagueRiley , thank you very much for your contribution. What I will do will seem harsh, but I have to reject this PR.
I have thought about it, and I don't think this project is the kind to have all sort of examples with various implementations (FSML, SDL, WinForm, etc). Especially for the same language.

The SDL example that is there, is mostly to show that the code works. I use this to test too. Its the most basic form of an example/test we can have.

I want to put a section in the README : Example projects using this code
And then list all external examples like yours, that you would host on your own repository.

What I would rather see in this project eventually, is bindings to other languages: JS bindings, C# bindings, Rust bindings, etc.