Added simple consume usecase mock

internal/usecases/consume/mock/consume.go

+package mockconsume
+
+// A Service implements the consume usecase interface (mock)
+type Service struct {
+	throwError bool
+}
+
+// NewService creates a new consume service (mock)
+func NewService() *Service {
+	return &Service{
+		throwError: false,
+	}
+}
+
+// Start starts the consume service (mock)
+func (s *Service) Start() {
+
+}