Implement SQLite Store using gorm and relational approach (#1065)

Restructure data handling for improved performance and flexibility. 
Introduce 'G'-prefixed fields to represent Gorm relations, simplifying resource management. 
Eliminate complexity in lookup tables for enhanced query and write speed. 
Enable independent operations on data structures, requiring adjustments in the Store interface and Account Manager.

management/cmd/root.go

@@ -34,6 +34,12 @@ var (
 		SilenceUsage: true,
 	}
 
+	migrationCmd = &cobra.Command{
+		Use:          "sqlite-migration",
+		Short:        "Contains sub-commands to perform JSON file store to SQLite store migration and rollback",
+		Long:         "",
+		SilenceUsage: true,
+	}
 	// Execution control channel for stopCh signal
 	stopCh chan int
 )
@@ -63,6 +69,14 @@ func init() {
 	rootCmd.PersistentFlags().StringVar(&logLevel, "log-level", "info", "")
 	rootCmd.PersistentFlags().StringVar(&logFile, "log-file", defaultLogFile, "sets Netbird log path. If console is specified the the log will be output to stdout")
 	rootCmd.AddCommand(mgmtCmd)
+
+	migrationCmd.PersistentFlags().StringVar(&mgmtDataDir, "datadir", defaultMgmtDataDir, "server data directory location")
+	migrationCmd.MarkFlagRequired("datadir") //nolint
+
+	migrationCmd.AddCommand(upCmd)
+	migrationCmd.AddCommand(downCmd)
+
+	rootCmd.AddCommand(migrationCmd)
 }
 
 // SetupCloseHandler handles SIGTERM signal and exits with success