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/HighLevelArchitecture/Guez/ngs_handler.h

@@ -0,0 +1,56 @@
+/**
+  * MainHandler for HighLevelArchitecture
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  * Created by Christian Ehrlicher, SLSE, 2017-04-07
+  */
+#pragma once
+
+#include <QObject>
+#include <memory>
+#include "dds_handler.h"
+#include "ppm_handler.h"
+#include "aes_handler.h"
+#include "ngs_handler.h"
+#include <Common/logger.h>
+
+#include <TrainingAreaBase/training_area_telegrams.h>
+
+namespace HighLevelArchitecture
+{
+class NgsHandler : public QObject
+{
+  Q_OBJECT
+public:
+  explicit NgsHandler(QObject *parent = nullptr);
+  ~NgsHandler();
+
+  bool init(const std::shared_ptr<DdsHandler> &ddsHandler);
+
+  std::shared_ptr<DdsHandler> ddsHandler() const { return m_ddsHandler; }
+  std::shared_ptr<NgsConnector> ngsConnector() const { return m_ngsConnector; }
+  std::shared_ptr<PpmHandler> ppmHandler() const { return m_ppmHandler; }
+  std::shared_ptr<AesHandler> aesHandler() const { return m_aesHandler; }
+
+  bool isConnectedToHla() const;
+
+Q_SIGNALS:
+  void firstTickFinished();
+  // HLA -> TAB
+  void externalEquipmentNumberAdded(int equipNo);
+  void externalEquipmentNumberRemoved(int equipNo);
+  void ngsHandlerReady();
+  // TAB -> HLA
+  void participantInitRequest(const TrainingAreaBase::TetraIcd::Init &request);
+  void participantBiteRequest(const TrainingAreaBase::TetraIcd::DemandBite &request);
+private slots:
+  void onFirstTickFinished();
+private:
+  std::shared_ptr<DdsHandler> m_ddsHandler;
+  std::shared_ptr<PpmHandler> m_ppmHandler;
+  std::shared_ptr<AesHandler> m_aesHandler;
+  std::shared_ptr<NgsConnector> m_ngsConnector;
+  LOGGER_T m_logger;
+};
+} // namespace HighLevelArchitecture