docs(log): document formatters module

[iuioiua]

Towards #3764

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.75%. Comparing base (2916cb8) to head (c9d81eb).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6073      +/-   ##
==========================================
+ Coverage   96.74%   96.75%   +0.01%     
==========================================
  Files         508      508              
  Lines       39132    39132              
  Branches     5786     5786              
==========================================
+ Hits        37858    37864       +6     
+ Misses       1232     1226       -6     
  Partials       42       42              

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[kt3k]

LGTM