doc: adding some conventions for callback naming

[samber]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.22%. Comparing base (48d8fe4) to head (9c060ac).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #738   +/-   ##
=======================================
  Coverage   94.22%   94.22%           
=======================================
  Files          18       18           
  Lines        2805     2805           
=======================================
  Hits         2643     2643           
  Misses        148      148           
  Partials       14       14           

Flag	Coverage Δ
unittests	94.22% <ø> (ø)

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