events: Add working example for CloudWatch Events

[ppai-plivo]

Updates:
#51
#112

[codecov-commenter]

Codecov Report

Merging #375 (9313d1f) into main (250c0d5) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #375   +/-   ##
=======================================
  Coverage   71.63%   71.63%           
=======================================
  Files          19       19           
  Lines        1040     1040           
=======================================
  Hits          745      745           
  Misses        228      228           
  Partials       67       67           

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