use ansi-width instead of textwrap for width calculation

[tertsdiepraam]

We don't need all the functionality of textwrap, our own ansi-width is enough.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (1522e5f) 53.46% compared to head (8633468) 81.62%.
Report is 3 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##             main      #36       +/-   ##
===========================================
+ Coverage   53.46%   81.62%   +28.15%     
===========================================
  Files           4        4               
  Lines         490      332      -158     
  Branches       80       60       -20     
===========================================
+ Hits          262      271        +9     
+ Misses        209       43      -166     
+ Partials       19       18        -1     

Flag	Coverage Δ
macos_latest	80.72% <100.00%> (+27.45%)	⬆️
ubuntu_latest	73.79% <100.00%> (+25.22%)	⬆️
windows_latest	4.51% <0.00%> (+2.88%)	⬆️

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[tertsdiepraam]

I'll cut another release after this, which will mean that I can finally get the changes into ls (and probably even eza).