[ENH] Add the ability to check the validity of an MAG

[aryan26roy]

Closes #89

Changes proposed in this pull request:

• Add a function to check the validity of an MAG.

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[codecov]

Codecov Report

Merging #90 (183ece1) into main (013513b) will decrease coverage by 0.04%.
The diff coverage is 33.33%.

❗ Current head 183ece1 differs from pull request most recent head 6132669. Consider uploading reports for the commit 6132669 to get more accurate results

@@            Coverage Diff             @@
##             main      #90      +/-   ##
==========================================
- Coverage   76.72%   76.68%   -0.04%     
==========================================
  Files          42       42              
  Lines        3317     3320       +3     
  Branches      952      952              
==========================================
+ Hits         2545     2546       +1     
- Misses        570      572       +2     
  Partials      202      202              

Files Changed	Coverage Δ
pywhy_graphs/algorithms/generic.py	83.52% <33.33%> (-0.88%)	⬇️

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