refactor: split ServiceCommand methods into dedicated files

- Move ServiceCommand.Start to commands_service_start.go
- Move ServiceCommand.Stop to commands_service_stop.go
- Move ServiceCommand.Restart to commands_service_restart.go
- Move ServiceCommand.Reload to commands_service_reload.go
- Move ServiceCommand.Status to commands_service_status.go
- Move ServiceCommand.Uninstall to commands_service_uninstall.go
- Move createStartCommands to commands_service_start.go
- Clean up imports in commands_service.go
- Remove all method implementations from main service file

This refactoring improves code organization by:
- Separating concerns into focused files
- Making navigation easier for developers
- Reducing merge conflicts between different commands
- Following consistent modular patterns
- Reducing commands_service.go from ~650 lines to ~50 lines

Each method is now co-located with its related functionality,
making the codebase more maintainable and easier to understand.

cmd/cli/commands_service_reload.go

@@ -0,0 +1,53 @@
+package cli
+
+import (
+	"errors"
+	"io"
+	"net/http"
+	"path/filepath"
+
+	"github.com/kardianos/service"
+	"github.com/spf13/cobra"
+)
+
+// Reload implements the logic from cmdReload.Run
+func (sc *ServiceCommand) Reload(cmd *cobra.Command, args []string) error {
+	status, err := sc.serviceManager.svc.Status()
+	if errors.Is(err, service.ErrNotInstalled) {
+		mainLog.Load().Warn().Msg("service not installed")
+		return nil
+	}
+	if status == service.StatusStopped {
+		mainLog.Load().Warn().Msg("service is not running")
+		return nil
+	}
+	dir, err := socketDir()
+	if err != nil {
+		mainLog.Load().Fatal().Err(err).Msg("failed to find ctrld home dir")
+	}
+	cc := newControlClient(filepath.Join(dir, ctrldControlUnixSock))
+	resp, err := cc.post(reloadPath, nil)
+	if err != nil {
+		mainLog.Load().Fatal().Err(err).Msg("failed to send reload signal to ctrld")
+	}
+	defer resp.Body.Close()
+	switch resp.StatusCode {
+	case http.StatusOK:
+		mainLog.Load().Notice().Msg("Service reloaded")
+	case http.StatusCreated:
+		mainLog.Load().Warn().Msg("Service was reloaded, but new config requires service restart.")
+		mainLog.Load().Warn().Msg("Restarting service")
+		if _, err := sc.serviceManager.svc.Status(); errors.Is(err, service.ErrNotInstalled) {
+			mainLog.Load().Warn().Msg("Service not installed")
+			return nil
+		}
+		return sc.Restart(cmd, args)
+	default:
+		buf, err := io.ReadAll(resp.Body)
+		if err != nil {
+			mainLog.Load().Fatal().Err(err).Msg("could not read response from control server")
+		}
+		mainLog.Load().Error().Err(err).Msgf("failed to reload ctrld: %s", string(buf))
+	}
+	return nil
+}