Introducing MT32-pi lite for MiSTer

This is simplified version of MT32-pi board. It uses Raspberry Pi Zero 2W. It doesn't have any buttons or displays and very compact. It sits firmly on the side of the case. It also doesn't use cable, so it has more stable connection.

More info you can find here:
https://github.com/MiSTer-devel/Hardware_MiSTer/tree/master/Addons/MT32PiHat_LT

Release gerbers are in usual place:
https://github.com/MiSTer-devel/Hardware_MiSTer/tree/master/releases