Feature request: Level compensation using IMU's

[Supermagnum]

This feature should be handy for those who are using mobile setups:
Use IMU's to detect if the mobile setups main mast is not 100% aligned to the "up" or X axis, compensate for that if its not perfectly straight up.

The suggested features is explained in this picture:
https://github.com/Supermagnum/Pirotator/blob/main/axis.png