feat: Handle enum (#FRAM-217)

[vincent4vx]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 96.73913% with 3 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (2.0@2e36a7e). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
src/Leaf/EnumElementBuilder.php	90.90%	2 Missing ⚠️
src/Choice/ChoiceBuilderTrait.php	83.33%	1 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff           @@
##             2.0      #19   +/-   ##
======================================
  Coverage       ?   98.41%           
  Complexity     ?     1135           
======================================
  Files          ?      112           
  Lines          ?     2709           
  Branches       ?        0           
======================================
  Hits           ?     2666           
  Misses         ?       43           
  Partials       ?        0           

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