Python script to convert USGS param to srf 2.0 file format

[jwjeremy]

I created a Python file to convert the USGS param file to srf 2.0 format for FaultPlane.py .

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (349a417) 13.89% compared to head (b8fc1fe) 13.89%.

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Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1008   +/-   ##
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  Coverage   13.89%   13.89%           
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  Files         257      257           
  Lines       14817    14817           
=======================================
  Hits         2059     2059           
  Misses      12758    12758           

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[fabian-kutschera]

Running the script currently results in a ValueError: could not convert string to float: 'depth'

The reason why this happens is that the file PREM.txt is saved with an additional blank line at the top.
Either change l.26 to skiprows=2 or maybe better, write l.11 to l.20 as follows:

PREM_STR = """depth radius vp vs rho Qu Qk P
0.0 6371.0 1.45 0.00 1.02 0.0 57823.0 0.0
3.0 6368.0 5.80 3.20 2.60 600.0 57823.0 0.0
15.0 6356.0 6.80 3.90 2.90 600.0 57823.0 0.3
24.4 6346.6 6.80 3.90 2.90 600.0 57823.0 0.6
71.0 6300.0 8.08 4.47 3.38 600.0 57823.0 2.2
80.0 6291.0 8.08 4.47 3.37 600.0 57823.0 2.5
171.0 6200.0 8.02 4.44 3.36 80.0 57823.0 5.5
"""

[Thomas-Ulrich]

I've started to review this PR, and I thought I could already do the proposed changes, it is here:
https://github.com/SeisSol/SeisSol/tree/thomas/usgs_conversion
Note the description of the srf file is here:
https://seissol.readthedocs.io/en/latest/kinematic.html
and the Northridge example here:
https://github.com/SeisSol/Examples/blob/master/Northridge/nr6.70-s0000-h0000.txt
So what is missing from my branch are The PLANE blocks.
Also, I don't know if the source time function should all start at t=0 for generate_FL33_input_files.py to work.
(I need to double check later)
I will continue working on it on Monday