Add chained rate limiter example

[martincostello]

Add example for chained rate-limiters as discussed in #2341.

Resolves #2343.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.40%. Comparing base (468bf0c) to head (5af6e6a).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2344   +/-   ##
=======================================
  Coverage   85.40%   85.40%           
=======================================
  Files         313      313           
  Lines        7467     7467           
  Branches     1126     1126           
=======================================
  Hits         6377     6377           
  Misses        745      745           
  Partials      345      345           

Flag	Coverage Δ
linux	85.37% <ø> (ø)
macos	85.40% <ø> (+0.02%)	⬆️
windows	85.40% <ø> (ø)

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[lonix1]

awesome

🍻