expose the widths of the columns

[tertsdiepraam]

I'm using this in a PR for eza, where there is a grid, where I then need to add a bit of text above each column.

I'll post the link to the draft PR there in a bit.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (8633468) 81.62% compared to head (52ba9ab) 83.73%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #37      +/-   ##
==========================================
+ Coverage   81.62%   83.73%   +2.10%     
==========================================
  Files           4        4              
  Lines         332      332              
  Branches       60       60              
==========================================
+ Hits          271      278       +7     
  Misses         43       43              
+ Partials       18       11       -7     

Flag	Coverage Δ
macos_latest	80.72% <100.00%> (ø)
ubuntu_latest	73.79% <100.00%> (ø)
windows_latest	4.51% <0.00%> (ø)

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