Raspberry Pi Mount for Root Robot

A design for mounting a Raspberry Pi on top of a Root robot using the pen hole and 5mm dia. x 1mm tall magnets which mate with locations specified in https://github.com/RootRobotics/root-robot-accessories . The primary version also has mounting features for an 18650 battery holder (MPD BH-18650-W). There is also a recess for adding an VL53L0X (example uses Adafruit's dev board).