REF: simplify orientation calculation

[martinfleis]

Simplification (and likely a speedup) of computation of a deviation from cardinal directions from an azimuth.

[codecov]

Codecov Report

Merging #349 (1ab64d2) into main (ae0d7dc) will decrease coverage by 0.37%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #349      +/-   ##
==========================================
- Coverage   95.89%   95.52%   -0.38%     
==========================================
  Files          13       13              
  Lines        2829     2815      -14     
==========================================
- Hits         2713     2689      -24     
- Misses        116      126      +10     

Impacted Files	Coverage Δ
momepy/distribution.py	97.40% <100.00%> (-0.15%)	⬇️
momepy/preprocessing.py	87.37% <0.00%> (-1.67%)	⬇️
momepy/elements.py	95.19% <0.00%> (-1.61%)	⬇️

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