Migrates residual Lts sources to generated rtiddsgen API

Adds NmeaManagement tests, fixes codegen includes and Qt6 SerialPort CMake target.

qt6-after/qt6-migrated-legatus/Lts/Services/ExerciseManagement/WebSocketInterface/data_manager.cpp

@@ -55,7 +55,7 @@ LtsWebSocket::ReplyMessage *DataManager::exerciseInformation(const QString &uuid
     exInfo.startTime   = exData.startTime.toMSecsSinceEpoch();
     exInfo.stopTime    = exData.stopTime.toMSecsSinceEpoch();
     exInfo.timeZone    = exData.defaultTimeZone;
-    exInfo.status      = exData.exerciseStateId;
+    exInfo.status      = static_cast<int>(exData.exerciseStateId);
     exInfo.description = exData.description;
 
     data.append(exInfo);