Check for Pardiso import

[kujaku11]

Pardiso or pydiso turns out to be not a straight forward install. So adding a test to see if it is installed and warning if not. Adding documentation to the Readme

[codecov]

Codecov Report

Attention: Patch coverage is 64.00000% with 9 lines in your changes missing coverage. Please review.

Project coverage is 33.20%. Comparing base (a6055c8) to head (d503d0a).
Report is 7 commits behind head on main.

Files with missing lines	Patch %	Lines
mtpy/modeling/simpeg/recipes/inversion_2d.py	62.50%	9 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #48      +/-   ##
==========================================
+ Coverage   33.18%   33.20%   +0.01%     
==========================================
  Files         146      146              
  Lines       23947    23966      +19     
==========================================
+ Hits         7947     7957      +10     
- Misses      16000    16009       +9     

Flag	Coverage Δ
tests	33.20% <64.00%> (+0.01%)	⬆️

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