Create area results settings table

[daanvaningen]

id, int, unique identifier
output_time_step, int, result write interval
start_time, int, simulation time to start writing results
end_time, int, simulation time to stop writing results
variables, List[str], comma separated str of variables to write to result files
subsets, List[str], comma separated str of subsets to write to result files (1D, 2D, 1D2D, 2D Groundwater)
geometry, geometry(Polygon), geometry of the area to write results for

TBD: How do we differentiate between different area result files in the settings?