msg: add message translation node for ROS

msg/translation_node/src/monitor.h

@@ -0,0 +1,23 @@
+/****************************************************************************
+ * Copyright (c) 2024 PX4 Development Team.
+ * SPDX-License-Identifier: BSD-3-Clause
+ ****************************************************************************/
+#pragma once
+
+#include <rclcpp/rclcpp.hpp>
+#include "pub_sub_graph.h"
+#include "service_graph.h"
+#include <functional>
+
+class Monitor {
+public:
+	explicit Monitor(rclcpp::Node &node, PubSubGraph* pub_sub_graph, ServiceGraph* service_graph);
+
+	void updateNow();
+
+private:
+	rclcpp::Node &_node;
+	PubSubGraph* _pub_sub_graph{nullptr};
+	ServiceGraph* _service_graph{nullptr};
+	rclcpp::TimerBase::SharedPtr _node_update_timer;
+};