Mvd online unpacker

Based on Ajit original branch with only rebasing and clang formatting on top

Goal of MR: check that code is compatible with CI in order to prepare local merging with parallel changes to the MUCH online unpacker
=> cleaner MR will come after beamtime
=> DO NOT TAKE OUT OF DRAFT MODE PLEASE!

Of Interest to: @ajit.kumar @b.gutsche

Edit 17/06/2025:
Also need CbmSoft/cbmroot_parameter!242 to work

Edit 27/06/2025:
Cleanup done in this MR