[mMUCH] Add parameters for May 2025 geometry (v25a_mcbm)
Parameters for Geometries of MUCH in mCBM may 2025 beamtime (Fe and Bi)
Related to geometry MR 306 and source code MR 2099
Of interest to: @d.emschermann @c.ghosh_AT_vecc.gov.in
Edited by Pierre-Alain Loizeau