introduce get_nwd function

[PythonFZ]

No description provided.

[codecov]

Codecov Report

Merging #726 (fdc7d6d) into main (33cd32b) will increase coverage by 0.04%.
The diff coverage is 88.88%.

@@            Coverage Diff             @@
##             main     #726      +/-   ##
==========================================
+ Coverage   85.90%   85.94%   +0.04%     
==========================================
  Files          25       25              
  Lines        1894     1900       +6     
  Branches      790      791       +1     
==========================================
+ Hits         1627     1633       +6     
  Misses        267      267              

Flag	Coverage Δ
fulltest	85.94% <88.88%> (+0.04%)	⬆️

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Files	Coverage Δ
zntrack/core/node.py	93.42% <100.00%> (-0.41%)	⬇️
zntrack/fields/dependency.py	95.34% <100.00%> (ø)
zntrack/fields/dvc/options.py	93.33% <100.00%> (ø)
zntrack/project/zntrack_project.py	90.53% <100.00%> (+0.03%)	⬆️
zntrack/utils/__init__.py	83.57% <100.00%> (+2.57%)	⬆️
zntrack/fields/zn/options.py	60.14% <42.85%> (ø)

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