Qt6 Migration: Complete migration with DDS/RTI support and build validation

Major Changes:
- Merged latest Qt5 devel content from dlbo (292 files changed, 7 new dirs)
- Consolidated forward-declarations and include folders
- Removed unneeded modules per Niklas' repo check list

Build System Fixes:
- Fixed CMake VERSION_GREATER syntax in ParticipantManagement/CMakeLists.txt
- Added VLC packages (libvlc-dev, vlc-plugin-base) to docker_build.sh
- Added PostgreSQL dev packages (libpq-dev, postgresql-server-dev-all) to Dockerfile
- Fixed locale warnings (ANSI_X3.4-1968 → C.UTF-8)
- Fixed ArcGIS SDK path warnings when BUILD_ARCGIS=OFF

Code Generation Fixes:
- Fixed IDL enum collisions (PortType→CorePortType/DdsutPortType, PdmEventType)
- Fixed Grantlee template svc_translation.cpp.grantlee:
  - Changed {{ idl_enum.name }}_def:: to {{ idl_enum.name }}::
  - Fixed .underlying() calls for C++11 scoped enums (enum class)
- Removed generated files from repo (moc_*, *_dtc.h, *_ftc.h)

Validation:
- BUILD_RTI=ON: SUCCESS
- BUILD_RTI=OFF: SUCCESS
- C++17 standard maintained for RTI 7.7 compatibility
- Ubuntu 26.04 Docker environment verified

Remaining Warnings (expected):
- BgViewer, KDChart, KDReports, Poppler-Qt6 not found (optional features)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

qt5-before/dlbo/Lts/Proxies/WirelessLocationSystem/web_socket_handler.h

@@ -0,0 +1,86 @@
+/**
+  * Websocket interface to the training area proxy
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  * Created by Christian Ehrlicher, SLSE, 2017-01-11
+  */
+
+#pragma once
+
+#include <QObject>
+#include <QQueue>
+#include <QWebSocketServer>
+#include <memory>
+#include <TrainingAreaBase/training_area_telegrams.h>
+#include <LtsCoordTrans/lts_coord_trans.h>
+
+#include "logger.h"
+
+namespace WirelessLocationSystem
+{
+class IsmHandler;
+class WebSocketWrapper;
+class WlsHandler;
+class WlsParticipant;
+class WlsParticipantHandler;
+
+class WebSocketHandler : public QObject
+{
+  Q_OBJECT
+public:
+  explicit WebSocketHandler(QObject *parent = nullptr);
+  ~WebSocketHandler();
+
+  bool init(std::shared_ptr<WlsHandler> wlsHandler,
+            std::shared_ptr<WlsParticipantHandler> participantHandler,
+            std::shared_ptr<IsmHandler> ismHandler,
+            quint16 listenPort);
+
+  template <typename T>
+  bool sendTelegram(const T *data, int exerciseId)
+  {
+    if (!data)
+      return false;
+
+    sendTelegramInternal(data,
+                         TrainingAreaBase::TetraIcd::Constraints<T>::type(),
+                         exerciseId);
+
+    return true;
+  }
+  bool sendWlsStateReport(int exerciseId = 0);
+
+public slots:
+  void sendBinarySfmData(const WlsParticipant *participant);
+  void sendDataCommunicationState(const WlsParticipant *participant);
+  void sendGpsPositionUsage(const WlsParticipant *participant);
+  void sendPosition(const WlsParticipant *participant);
+  void forceSendPosition(const WlsParticipant *participant,
+                         int moutObjectId, int moutRoomId);
+
+private slots:
+  void onNewConnection();
+  void onTextMessageReceived(const QString &baJson);
+
+signals:
+  void signalBroadcastMessage(const QString &msg, int exerciseId);
+
+private:
+  template <typename T>
+  void setPosition(T &tele, const WlsParticipant *participant);
+  void sendTelegramInternal(const TrainingAreaBase::TetraIcd::TrainingAreaTelegram *data,
+                            const QString &type, int exerciseId);
+  void sendParticipantConnectionStates(int exerciseId);
+
+  QWebSocketServer *m_webSocketServer;
+  std::shared_ptr<WlsHandler> m_wlsHandler;
+  std::shared_ptr<IsmHandler> m_ismHandler;
+  std::shared_ptr<WlsParticipantHandler> m_participantHandler;
+
+  LtsCoordTrans::UtmCoordinate m_basePoint;
+  LOGGER_T m_logger;
+};
+
+
+} // namespace WirelessLocationSystem