[Feature Request] Add example files for adding custom music.

[Lexiosity]

There are many people who have no idea how to set up banks or even add music to the Randomizer in general, and there's not even any tutorials for it, since the only tutorials for custom music is for OoT64 Randomizer, but that uses a whole different format. So providing example files and a text-form tutorial would help with people who are new to adding custom music and even OoT3D Randomizer in general.

[Kewlan]

We should probably link to it from this repo, but anyway here it is: https://github.com/Kewlan/OoT3D-Custom-Sequences