Add wrappers for Femtic

[kujaku11]

Add wrappers to create input files for FEMTIC . Yoshiya has written some C++ codes for making input files, namely mesh building, it would be nice to have some Python wrappers to make those run easier once they are compiled on an HPC and add in making of data files from MTData.

• Add ability to make FEMTIC input data file
  • Add methods MTData.to_femtic() and MTData.from_femtic
• Add methods to create inputs for mesh generation
• Add method to read mesh
• Add methods to read outputs
• Add methods for control files
• Add documentation
• Add tests

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 28.25%. Comparing base (69d92ec) to head (554a3cf).
Report is 4 commits behind head on main.

Files	Patch %	Lines
mtpy/modeling/femtic/__init__.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #39      +/-   ##
==========================================
- Coverage   28.25%   28.25%   -0.01%     
==========================================
  Files         132      133       +1     
  Lines       22226    22227       +1     
==========================================
  Hits         6280     6280              
- Misses      15946    15947       +1     

Flag	Coverage Δ
tests	28.25% <50.00%> (-0.01%)	⬇️

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