a coupled of python script

[Thomas-Ulrich]

When developing an automated workflow for setting up dynamic rupture models, I've made improvements to some existing workflow, and developed other scripts that I would like to add to the repository:

• FL33 workflow
  • add support to multiple fault planes
  • add support for USGS fsp and param formats, and Slipnear formats
  • refined way of defining rake when the slip is low compute_rake_interp_low_slip
• generate_vtk_grid.py (Generate lat/lon grid for Paraview visualization)
• generate_vtk_coastline.py (improvement of the previous script)
• Improve and commit to the repository interpolate_seissol_data_to_grid.py (used e.g. in
  https://github.com/Thomas-Ulrich/Turkey-Syria-Earthquakes/tree/main/SeisSolSetupHeterogeneities/asagi_file)
• compute_moment_rate_from_finite_fault_file.py when this information is not available for download.
• generate_fault_output_from_fl33_input_files.py: allows visualizing a kinematic model in the seissol fault output format.