refactor: improve ServiceManager initialization with cleaner API

- Split initializeServiceManager into two methods:
  * initializeServiceManager(): Simple method using default configuration
  * initializeServiceManagerWithServiceConfig(): Advanced method for custom config
- Simplify NewServiceCommand() to return *ServiceCommand without error
- Update all service command methods to use appropriate initialization:
  * Start: Uses initializeServiceManagerWithServiceConfig() for custom args
  * Stop/Restart/Reload/Status/Uninstall: Use simple initializeServiceManager()
- Remove direct access to sc.serviceManager.svc/prog in favor of lazy initialization
- Improve separation of concerns and reduce code duplication

cmd/cli/commands_service_stop.go

@@ -10,10 +10,14 @@ import (
 
 // Stop implements the logic from cmdStop.Run
 func (sc *ServiceCommand) Stop(cmd *cobra.Command, args []string) error {
-	s := sc.serviceManager.svc
-	p := sc.serviceManager.prog
 	readConfig(false)
 	v.Unmarshal(&cfg)
+
+	s, p, err := sc.initializeServiceManager()
+	if err != nil {
+		return err
+	}
+
 	p.cfg = &cfg
 	p.preRun()
 	if ir := runningIface(s); ir != nil {