support pyscf

[mcocdawc]

this PR supports the conversion to/from pyscf Molecules. pyscf.gto.Mole

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 12 lines in your changes missing coverage. Please review.

Project coverage is 0.00%. Comparing base (521240f) to head (6855a86).
Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
...oord/_cartesian_coordinates/_cartesian_class_io.py	0.00%	9 Missing ⚠️
src/chemcoord/__init__.py	0.00%	3 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff           @@
##           master    #112   +/-   ##
======================================
  Coverage    0.00%   0.00%           
======================================
  Files          27      29    +2     
  Lines        2787    2783    -4     
======================================
+ Misses       2787    2783    -4     

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