msg: add message translation node for ROS

msg/translation_node/translations/example_translation_service_v1.h

@@ -0,0 +1,38 @@
+/****************************************************************************
+ * Copyright (c) 2024 PX4 Development Team.
+ * SPDX-License-Identifier: BSD-3-Clause
+ ****************************************************************************/
+#pragma once
+
+// Translate ExampleService v0 <--> v1
+#include <px4_msgs_old/srv/example_service_v0.hpp>
+#include <px4_msgs/srv/example_service.hpp>
+
+class ExampleServiceV1Translation {
+public:
+	using MessageOlder = px4_msgs_old::srv::ExampleServiceV0;
+	static_assert(MessageOlder::Request::MESSAGE_VERSION == 0);
+
+	using MessageNewer = px4_msgs::srv::ExampleService;
+	static_assert(MessageNewer::Request::MESSAGE_VERSION == 1);
+
+	static constexpr const char* kTopic = "fmu/example_service";
+
+	static void fromOlder(const MessageOlder::Request &msg_older, MessageNewer::Request &msg_newer) {
+		// Request: set msg_newer from msg_older
+	}
+
+	static void toOlder(const MessageNewer::Request &msg_newer, MessageOlder::Request &msg_older) {
+		// Request: set msg_older from msg_newer
+	}
+
+	static void fromOlder(const MessageOlder::Response &msg_older, MessageNewer::Response &msg_newer) {
+		// Response: set msg_newer from msg_older
+	}
+
+	static void toOlder(const MessageNewer::Response &msg_newer, MessageOlder::Response &msg_older) {
+		// Response: set msg_older from msg_newer
+	}
+};
+
+REGISTER_SERVICE_TRANSLATION_DIRECT(ExampleServiceV1Translation);