- Add GET /settings/get and POST /settings/set endpoints for managing system settings
- Implement config file persistence for settings changes
- Update config schema to include notification and webhook settings
- Add API documentation for new endpoints
- Move config path variables to global package for consistency
- Move Config struct and related functions to global package
- Consolidate handler utilities into utils package
- Remove deprecated handlers and instance packages
- Add new handlers package with settings and proxy functionality
- Update config.json to include watchdog enabled flag
