Update interface for v6 meta-issue

[jbreue16]

This is a meta issue to track all the interface changes we want to have for v6

open

• inconsistent FV vs DG interface: for units with npartype=0, FV needs total porosity, DG needs col_porosity, the latter should be used
• Update geometry interface #510
• Update Parameter Sensitivity Interface #126
• Improved reactions interface #77
• Unify flowrate / velocity interface #381
• https://github.com/cadet/CADET-Specification/issues/5
• rename inlet and outlet unit operations to source and sink unit operations (having an outlet and an inlet, respectively)
• fix inconsistencies
  • consistent output for DG and FV particles: ordering of state
  • SPLIT_COMPONENT_DATA only applies to outlet solution #631
  • change WRITE_SOLUTION_PARTICLE to WRITE_SOLUTION_PORE
  • BINDING_MODEL instead of ADSORPTION_MODEL, which is consistent with our modeling paper?
  • Update to consistent axial disc type interface #614
  • double check all discretization fields: e.g. PAR_NELEM for DG but NCELLS for FV
  • double check: what happens if has_film_diffusion=false but has_pore_diffusion=true? should throw an exception, model does not exist

done

• https://github.com/cadet/CADET-Specification/issues/4 -> fixed by Refactor and generalize particle modeling #414
• Improve parameter interface #284
• Make field NPARTYPE mandatory for column UO #589
• Make field CRY_MODE mandatory for crystallization models #591