I24 serial: set the beam center using lookup tables

[noemifrisina]

Set up a plan that the beamline staff can use from the command line to update the beam center values at the beggining of each run.

[noemifrisina]

It would be best if there is only one place the beamline staff need to update for the beamcenter. It looks like GDA uses lookup tables where the beamcenter position in relation to the detector distance is updated. This value is in mm so the plan should also do the conversion to pixels (the pixel sizes for both detectors are known).
This way we can use the same lookup tables as GDA does and the beamline staff only needs to update things in one place.