[FEATURE] - imod.mf6.open_hds and imod.mf6.open_cbc should be able to merge split domains as well #1728
Description
Is your feature request related to a problem? Please describe.
Mentioned by @jdelsman :
Right now only imod.mf6.Modflow6Simulation.open_hds and imod.mf6.Modflow6Simulation.open_cbc support merging output together. This is nice for tutorials, but often these large simulations are ran outside the python process, and reading output is done in a separate script. For this, we do not want to construct imod.mf6.Modflow6Simulation objects again.
So it is a necessity to have the functions imod.mf6.open_hds and imod.mf6.open_cbc to be able to merge those outputs as well. Or create separate functions to open output and merge.