Support KDMAPI backend

[rsp4jack]

Have look about it: https://github.com/KeppySoftware/OmniMIDI/blob/master/DeveloperContent/KDMAPI.md

[jcelerier]

looks good!

[jcelerier]

done, also added an example, it's fun! I can reach ~100k notes / second on my 5950X, I don't know if there's more optimization to be done