Add descriptive header to each example

[svchb]

Extracted from #749

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.72%. Comparing base (d4f8af7) to head (af6baf8).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #815   +/-   ##
=======================================
  Coverage   70.72%   70.72%           
=======================================
  Files         106      106           
  Lines        6703     6703           
=======================================
  Hits         4741     4741           
  Misses       1962     1962           

Flag	Coverage Δ
unit	70.72% <ø> (ø)

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