dirs for constitutive Relations and BCs
- separate folders for constitutive relations and boundary condition template files
- moved TH freezing files where they belong
- added medium template xml as an input in snakemake
- passed the paths of timestepping, lin_solvers and medium templates from snakemake to csv2prj to only have one place to check for these files
tested with Ton-Nord, Salz-Kissen, TH/THM/TH-freezing/TH-phaseless
Edited by Florian Zill