msg: add message translation node for ROS

msg/translation_node/translations/example_translation_direct_v1.h

@@ -0,0 +1,30 @@
+/****************************************************************************
+ * Copyright (c) 2024 PX4 Development Team.
+ * SPDX-License-Identifier: BSD-3-Clause
+ ****************************************************************************/
+#pragma once
+
+// Translate ExampleTopic v0 <--> v1
+#include <px4_msgs_old/msg/example_topic_v0.hpp>
+#include <px4_msgs/msg/example_topic.hpp>
+
+class ExampleTopicV1Translation {
+public:
+	using MessageOlder = px4_msgs_old::msg::ExampleTopicV0;
+	static_assert(MessageOlder::MESSAGE_VERSION == 0);
+
+	using MessageNewer = px4_msgs::msg::ExampleTopic;
+	static_assert(MessageNewer::MESSAGE_VERSION == 1);
+
+	static constexpr const char* kTopic = "fmu/out/example_topic";
+
+	static void fromOlder(const MessageOlder &msg_older, MessageNewer &msg_newer) {
+		// Set msg_newer from msg_older
+	}
+
+	static void toOlder(const MessageNewer &msg_newer, MessageOlder &msg_older) {
+		// Set msg_older from msg_newer
+	}
+};
+
+REGISTER_TOPIC_TRANSLATION_DIRECT(ExampleTopicV1Translation);