Figure out how to calibrate stepper motors for initialization

[nico-palmar]

• Need to have a procedure to initialize the tracking in a standard way, and start position control for the motors in a good state
• Don't want to overshoot the max stepper motion
• Want to have a good starting point for absolute angle measurements on an axis

[shivam-sh]

Elevation calibration is done, azimuth is put on pause until the end