Replace individual service command initialization with unified InitServiceCmd()
that creates a complete service command hierarchy. Port all original logic
from initStartCmd, initStopCmd, initRestartCmd, initReloadCmd, initStatusCmd,
and initUninstallCmd into ServiceCommand methods with proper dependency injection.
Key changes:
- Port complete Start logic including config validation, service installation,
DNS management, and self-check functionality
- Port complete Stop logic with deactivation pin validation and DNS cleanup
- Port complete Restart logic with config validation and DNS restoration
- Port complete Reload logic with HTTP status handling and restart fallback
- Port complete Status logic with proper exit codes
- Port complete Uninstall logic with cleanup file removal
- Add all necessary flags to service commands (iface, pin, etc.)
- Use InitInterfacesCmd() for interfaces subcommand
- Simplify cli.go by replacing multiple init calls with single InitServiceCmd()
This refactoring eliminates code duplication, improves maintainability, and
ensures all service commands have their complete original functionality.
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