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

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 28.25%. Comparing base (3bee0af) to head (554a3cf).
⚠️ Report is 383 commits behind head on updates.

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

Additional details and impacted files

@@             Coverage Diff             @@
##           updates      #39      +/-   ##
===========================================
- Coverage    28.36%   28.25%   -0.11%     
===========================================
  Files          132      133       +1     
  Lines        22041    22227     +186     
===========================================
+ Hits          6251     6280      +29     
- Misses       15790    15947     +157     

Flag	Coverage Δ
tests	28.25% <0.00%> (-0.11%)	⬇️

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