Added fmod studio project

[wistpotion]

While attempting to use this extension it took a fair bit of wrangling to figure out how to get my own banks in, and what to do in fmod studio to get things to actually start. So I added a studio project file to the example, and added control over the fmod parameter "RPM" with the up and down arrows. Just for the funs of it ✨

A more formal list of changes:

• set [fmod] live_update = 1 in game.project
• added fmod studio project to example
• added control of fmod parameter "RPM" with up and down arrow