- **README.md**: Added a 'Fork Features' section to highlight new enhancements like Google health checks, IP validation, and program termination for VPN health checks.
- **main.go**: Integrated new health check logic.
- **http.go**: Added 'responseWith' function and imported 'strconv' for better HTTP response handling.
- **wireguard.go**:
- Added imports for 'log', 'os', 'strings', and 'time'.
- Enhanced 'StartWireguard' with handshake verification and Google connectivity checks.
- Implemented program termination on critical check failures.
- **utils.go**:
- Renamed from 'util.go'.
- Added 'CheckGoogleConnectivity' and 'checkIP' functions for external connectivity validation.
- **config.go**: No changes.
- **net.go**: No changes.
- **routine.go**: No changes.
These updates improve the reliability, security, and maintainability of the WireGuard VPN management system by ensuring proper connectivity and health checks.