MIDI Testing and Learning

Very very early build. Only supporting MIDI input and only spawning Notes in octave 3 randomly.

What I am looking for is how the experience is to get this to work in other systems. Godot will auto listen to midi devices but doesn't allow any manual pick of device. As such it might not see a MIDI device. Especially if that device is already used by some other software.

If You test it, do let me know how the experience was with getting the MIDI device recognized. Either directly or just drop a comment bellow.