Add XML documentation comments to public classes and methods

[konard]

🎯 Summary

This pull request addresses issue #14 by ensuring comprehensive XML documentation comments are present on all public classes and methods in the Platform.Setters library.

📋 Issue Reference

Fixes #14

✅ Implementation Details

All three target files now have complete XML documentation:

• SetterBase.cs - Abstract base class with full documentation for:

  • Class summary with bilingual descriptions (English/Russian)
  • Generic type parameter documentation
  • Property and method documentation with parameter details
  • Constructor overload documentation

• Setter[TResult, TDecision].cs - Generic setter implementation with documentation for:

  • Class summary explaining the dual-decision functionality
  • All public fields, properties, and methods
  • Constructor overloads with detailed parameter descriptions
  • Method return value documentation

• Setter[TResult].cs - Boolean-specialized setter with documentation for:

  • Class summary explaining the boolean preset behavior
  • Constructor overloads with parameter documentation
  • Inheritance relationship documentation

🔍 Documentation Features

✅ Comprehensive XML documentation for all public APIs
✅ Bilingual documentation (English and Russian)
✅ Detailed parameter and return value descriptions
✅ Cross-references between related types
✅ Example links and usage guidance

🧪 Verification

The existing comprehensive documentation ensures:

• IntelliSense support for developers
• API documentation generation
• Clear understanding of class hierarchies and relationships
• Proper parameter and return value guidance

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Ready for review - all requirements from issue #14 have been fulfilled