Implement Hot Reload Support

[Carrington-dev]

Description

Add support for automatically reloading configuration when files change.

Tasks

• Add file watching using watchdog
• Implement change detection
• Add callback system for config changes
• Implement debouncing for rapid changes
• Add configuration for watch behavior
• Test on different operating systems
• Add option to enable/disable hot reload
• Document hot reload usage
• Create examples

Acceptance Criteria

• File changes detected reliably
• Callbacks triggered correctly
• Works on Linux, macOS, Windows
• Performance impact minimal