[FIX] Raise MAPInferenceEngineError if loss is nan

[felipeangelimvieira]

Add an exception to be raised when the optimization of MAP finds NaN values

Closes #39

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.60%. Comparing base (26f5102) to head (b05c5cc).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #88      +/-   ##
==========================================
+ Coverage   93.35%   93.60%   +0.25%     
==========================================
  Files          26       26              
  Lines        1173     1188      +15     
==========================================
+ Hits         1095     1112      +17     
+ Misses         78       76       -2     

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