Have option to create output path automatically + return it

[geofileops]

Have option to create output path automatically + return it

[theroggy]

Based on meeting with Sven and Jan:

• Automatic filename generation based on input file(s)
  • if 1 input file, take first 80 chars of input file + operation (eg. "_DISS" for dissolve) + numeric suffix if filename exists already + extension of input file.
  • if 2 input files, take first 40 chars of input1 file + operation (eg. "INTERS" for intersection) + take first 40 chars of input2 file + numeric suffix (eg. "_1") if filename exists already + extension of input file (if one of them is gpkg, gpkg, ortherwise ext of input1)
• directory to use
  • if output_path is None: create tmp dir (%temp%/geofileops_tmp/00001/)+ generate filename as above
  • if output_path is a dir: use the dir + generate filename as above
  • if output_path is a dir: use the path (= current behaviour)

• return output_path in all cases

[theroggy]

Remark: think about what to do with combination of force=True/False versus automatic name creation with existing name...