Initial draft for Anderson Darling test constraint.

[kklein]

Reference implementation: https://github.com/scipy/scipy/blob/v1.9.0/scipy/stats/_morestats.py#L2035-L2191

Reference publications: https://www.jstor.org/stable/2288805 https://www.jstor.org/stable/2335097

[codecov[bot]]

Codecov Report

Merging #54 (8ae60ef) into main (deccd34) will decrease coverage by 1.49%. The diff coverage is 87.27%.

@@            Coverage Diff             @@
##             main      #54      +/-   ##
==========================================
- Coverage   93.90%   92.40%   -1.50%     
==========================================
  Files          15       15              
  Lines        1607     1660      +53     
==========================================
+ Hits         1509     1534      +25     
- Misses         98      126      +28     

Impacted Files	Coverage Δ
src/datajudge/requirements.py	93.21% <44.44%> (-1.30%)	:arrow_down:
src/datajudge/constraints/stats.py	93.82% <93.54%> (-0.18%)	:arrow_down:
src/datajudge/db_access.py	89.69% <100.00%> (-4.42%)	:arrow_down:
src/datajudge/constraints/column.py	97.61% <0.00%> (-2.39%)	:arrow_down:

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