Write string signals to result file

[wojciech-graj]

Is your feature request related to a problem? Please describe.
Simulation result files (*.mat, *.csv) currently contain only real, integer, and boolean signals. I have some signals that are strings that I would like to include in the results.

Describe the solution you'd like
I'm not familiar with the mat file format, so I don't know how feasible it is to add there. However, for CSV files, it's as simple as adding a few lines to the following part of the CSVWriter

        switch (parameters[j].signal.type)
        {
          case SignalType_REAL:
            fprintf(pFile, ", %.12g", parameters[j].value.realValue);
            break;
          case SignalType_INT:
            fprintf(pFile, ", %d", parameters[j].value.intValue);
            break;
          case SignalType_BOOL:
            fprintf(pFile, ", %d", parameters[j].value.boolValue);
            break;
        }

Describe alternatives you've considered
N/A

Additional context
N/A