New "reset" function using MD01

[varenius]

May need to reset the telescope pointing from software.
Azimuth:
MD01 and BIGRAS/HR rotor can go around forever in azimuth. This is good, as long as we keep track so we don't damage cables due to wrapping. But, to align we cannot use end-positions as there are not any.
We have installed https://se.rs-online.com/web/p/proximity-sensors/7858468/ on both SALSA Vale and Brage. This provides a reference point in azimuth.
Currently, the sensors are mounted at azimuth 181 deg (Brage) and 187 deg (Vale). Can be read via I/O card polling.
The sensor span (where the signal is given) is 1-2 degrees. But, if approaching carefully from one end, it should be possible to align with 0.2 deg precision (since MD01 accuracy is 0.1 deg).
Elevation:
For elevation, we can (hopefully) use the hardware limit switches. This means; make sure we have e.g. 10 seconds before PULS timeout, then drive telescope to somewhere sensible, like 20 degrees, and then down towards the limit. This has to go around the software limits, as we want to push into the maximum. Keep track: If telescope is not moving, but did not reach where we wanted, then we are done (as long as we did send the telescope inside the MD01 limits, else it won't move).

Can set the MD01 position after reset from software via "CALIBRATE" command, https://github.com/varenius/salsa/blob/main/Developer_notes/BIGRAS_HR_MD0X/MD01-python3-test.py#L61. So, once we know where we are, we can use this to realign.

[varenius]

Should be fixed in 67389b0, but only tested on Brage so far.

[varenius]

Works also on Vale.
But! Seems to be some residual strange bug where sometimes the azimuth checking step (at least on Brage) just does not progress. It says something like this:

But it never reaches that position. This is strange, I've never seen that in any other use of the telescope. Including several days of position-switching on/off the sun. Well, restarting the control program and doing a reset again for now works. But want to understand the reason for this!

[varenius]

... should fix so that the "RESET" action in telescope controller is actually used, instead of calling the reset function from main as is now.