integrate cwalk for cross-platform path handling

[scholarsmate]

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[codecov-commenter]

Codecov Report

Merging #140 (8b0cee9) into main (eca8b15) will decrease coverage by 0.30%.
The diff coverage is 94.73%.

@@            Coverage Diff             @@
##             main     #140      +/-   ##
==========================================
- Coverage   93.48%   93.17%   -0.31%     
==========================================
  Files          17       17              
  Lines        1320     1348      +28     
==========================================
+ Hits         1234     1256      +22     
- Misses         86       92       +6     

Impacted Files	Coverage Δ
src/lib/utility.c	90.83% <88.67%> (-4.27%)	⬇️
src/lib/edit.cpp	88.19% <100.00%> (ø)
src/lib/impl_/internal_fun.cpp	62.29% <100.00%> (ø)
src/tests/omega_test.cpp	100.00% <100.00%> (ø)
src/tests/test_util.h	94.73% <100.00%> (ø)

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