Configuration System - YAML Support

[Chafficui]

Description

Implement YAML configuration system with type safety.

Tasks

• Create configuration manager
• Implement YAML parsing
• Add type conversion
• Create validation system
• Implement default values
• Add configuration reloading
• Create migration system

Acceptance Criteria

• YAML configurations load correctly
• Type conversion works properly
• Validation system functions
• Default values work as expected
• 80% test coverage achieved