Add samples for Iterable.toContain.exactly

[Nikos-Tsiougranas]

Adds samples for Iterable.toContain.exactly

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I confirm that I have read the Contributor Agreements v1.0, agree to be bound on them and confirm that my contribution is compliant.

[codecov]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (288b3fe) 91.83% compared to head (a621e4d) 91.83%.

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #1559   +/-   ##
=========================================
  Coverage     91.83%   91.83%           
  Complexity      114      114           
=========================================
  Files           418      418           
  Lines          4531     4531           
  Branches        224      224           
=========================================
  Hits           4161     4161           
  Misses          323      323           
  Partials         47       47           

Flag	Coverage Δ
current	91.39% <ø> (ø)
current_windows	90.50% <ø> (ø)

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Files	Coverage Δ
.../api/fluent/en_GB/iterableLikeToContainCheckers.kt	100.00% <ø> (ø)

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[robstoll]

@Nikos-Tsiougranas thanks for the contribution 🙏