Guider refactor

[albireox]

Major refactor of the guider code. The main differences are:

• Extracted sources are always matched to Gaia DR3 regardless of whether the solution was obtained using astrometry.net or kd-tree. lmag zero points are calculated for each source.
• Once acquisition is complete the WCS of the individual cameras is determined from the Gaia cross-match, and not by tranlating the reference WCS using the measured offset. This allows each new WCS to also reflect changes in PA.
• Average zero points and PAs are output.
• All the metadata is carried out in two dataclasess, CameraSolution and GuiderSolution.
• The output data model has changed. Former proc- files are now named lvm.{telescope}.guider, and sources are saved as parquet tables. The latter allows to preserve the column types in the presence of missing data.