feat: add services and separate further

internal/server/service/ctrlservice.go

@@ -0,0 +1,21 @@
+package service
+
+import (
+	"orbits-server/internal/server/database"
+
+	"gorm.io/gorm"
+)
+
+type CtlService struct {
+	db *gorm.DB
+}
+
+func NewControlService(db *gorm.DB) *CtlService {
+	return &CtlService{
+		db: db,
+	}
+}
+
+func (s *CtlService) ListLatestCommand() (database.Command, error) {
+	return database.LatestCommand(s.db)
+}