feat: implement enumeration reflection system

[ArthurVasseur]

• Add EnumValue class to represent individual enum values with name, value, and index
• Add Enumeration class inheriting from Object to represent enum instances
• Add EnumerationClass inheriting from Class to manage enum metadata
• Add EnumIterator and EnumIterable for range-based for loop support with structured bindings
• Implement ToString/FromString for enum value conversion
• Implement HasFlag/SetFlag/ToggleFlag for bitwise flag operations
• Modify CppGenerator to generate EnumerationClass metadata for @cct::Enum marked enums
• Add unit tests in Enum.cpp demonstrating all features

[codecov]

Codecov Report

❌ Patch coverage is 84.32203% with 37 lines in your changes missing coverage. Please review.
✅ Project coverage is 71.24%. Comparing base (a3706c2) to head (8c3f141).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...rc/Concerto/Reflection/Enumeration/Enumeration.cpp	61.76%	11 Missing and 2 partials ⚠️
Src/Concerto/Reflection/EnumValue/EnumValue.cpp	16.66%	10 Missing ⚠️
...ncerto/Reflection/Enumeration/EnumerationClass.cpp	83.33%	2 Missing and 3 partials ⚠️
...rc/Concerto/Reflection/Enumeration/Enumeration.inl	50.00%	4 Missing ⚠️
...c/Concerto/Reflection/Enumeration/EnumIterator.inl	81.81%	2 Missing ⚠️
Src/Tests/Enum.cpp	97.67%	0 Missing and 2 partials ⚠️
...rto/PackageGenerator/CppGenerator/CppGenerator.cpp	96.77%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main       #7      +/-   ##
==========================================
+ Coverage   70.02%   71.24%   +1.21%     
==========================================
  Files          42       53      +11     
  Lines        2062     2274     +212     
  Branches      279      294      +15     
==========================================
+ Hits         1444     1620     +176     
- Misses        490      519      +29     
- Partials      128      135       +7     

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