feat: enhance name detection for composite and alphanumeric patterns

[meabed]

Summary

This PR significantly enhances the name detection functionality to handle modern email patterns including composite names, alphanumeric patterns, and complex multi-part structures.

What's Changed

🚀 Enhanced Composite Name Detection

• Support for alphanumeric composite names (e.g., mo1.test2@example.com → Mo1 Test2)
• Smart handling of mixed letter-number patterns
• Preservation of alphanumeric identities when contextually appropriate

🎯 Intelligent Number Processing

• Context-aware number handling in email addresses
• Smart extraction of base names from trailing numbers (john123 → John)
• Mixed case processing (john2.doe → John, Doe)

📋 Advanced Contextual Suffix Recognition

• Recognition of development suffixes (dev, company, team)
• Year pattern detection and filtering (1900-2099)
• Corporate and organizational suffix handling

🔧 Technical Improvements

• Enhanced confidence scoring system (0.4-0.9 based on pattern complexity)
• Comprehensive test coverage (212 test cases)
• Maintained linear time complexity O(n)
• 100% backward compatible - no breaking changes

Examples

// Composite alphanumeric names
detectName('mo1.test2@example.com')
// Returns: { firstName: 'Mo1', lastName: 'Test2', confidence: 0.6 }

// Smart number handling
detectName('john.doe123@example.com')
// Returns: { firstName: 'John', lastName: 'Doe', confidence: 0.8 }

// Contextual suffix recognition
detectName('jane.smith.dev@example.com')
// Returns: { firstName: 'Jane', lastName: 'Smith', confidence: 0.7 }

Testing

• ✅ All existing tests pass
• ✅ Added comprehensive test coverage for new patterns
• ✅ 212 test cases covering various edge cases
• ✅ Full integration tests with email verification

Documentation

• Updated README with enhanced detection patterns
• Added detailed CHANGELOG entry for v2.6.0
• Created comprehensive release notes
• Added technical documentation in docs/

Checklist

• Code follows project style guidelines
• Tests have been added/updated
• Documentation has been updated
• All tests pass
• Backward compatibility maintained
• No breaking changes