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/TrainingAreaBase/dds_handler.h

@@ -0,0 +1,72 @@
+/**
+  * DdsHandler for DDS
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  * Created by Christian Ehrlicher, SLSE, 2016-04-14
+  */
+#pragma once
+
+#include <DDS/DDSConnector/dds_connector.h>
+#include <DDS/Core/core_dtc_types.h>
+
+#include <TrainingAreaBase/tab_dts_types.h>
+#include <TrainingAreaBase/tab_dts.h>
+#include <TrainingAreaBase/tab_fts.h>
+#include <NotificationManagement/nom_ftc.h>
+#include <ParticipantManagement/ppm_ftc.h>
+#include <OperatorManagement/opm_dtc.h>
+
+#include "logger.h"
+
+namespace NGL
+{
+class INGLLogger;
+}
+
+namespace Core
+{
+class Pacemaker;
+}
+
+namespace TrainingAreaBase
+{
+class DdsHandler
+{
+public:
+  DdsHandler(int domainId, int exerciseId);
+  ~DdsHandler();
+
+  bool init(const QStringList &qosFileList = QStringList());
+
+  std::shared_ptr<Core::Pacemaker> pacemaker() const { return m_pacemaker; }
+  std::shared_ptr<TrainingAreaBase::Interface::Dts> dtsTab() const { return m_dtsTab; }
+  std::shared_ptr<TrainingAreaBase::Interface::Fts> ftsTab() const { return m_ftsTab; }
+  std::shared_ptr<ParticipantManagement::Interface::Ftc> ftsPpm() const { return m_ftcPpm; }
+  std::shared_ptr<NotificationManagement::Interface::Ftc> ftcNom() const { return m_ftcNom; }
+  std::shared_ptr<OperatorManagement::Interface::Dtc> dtcOpm() const { return m_dtcOpm; }
+
+  std::shared_ptr<DDSConnector::DdsConnector> ddsConnector() const { return m_ddsConnector; }  
+  std::shared_ptr<DTS::EmergencyCall> emergencyCall() const { return m_dtsEmergencyCall; }
+  qint64 partitionTime() const { return m_curMSecSinceEpoch; }
+  int    getExerciseId() const { return m_exerciseId;}
+
+private:
+  std::shared_ptr<DDSConnector::DdsConnector>       m_ddsConnector;  
+  std::shared_ptr<DTC::PartitionTimeImpl>           m_dtcPartitionTime;
+  std::shared_ptr<Core::Pacemaker>                  m_pacemaker;
+  std::shared_ptr<TrainingAreaBase::Interface::Dts> m_dtsTab;
+  std::shared_ptr<TrainingAreaBase::Interface::Fts> m_ftsTab;
+  std::shared_ptr<ParticipantManagement::Interface::Ftc> m_ftcPpm;
+  std::shared_ptr<NotificationManagement::Interface::Ftc> m_ftcNom;
+  std::shared_ptr<OperatorManagement::Interface::Dtc> m_dtcOpm;
+
+  std::shared_ptr<DDSConnector::Publisher>          m_dtsEmergencyCallPublisher;
+  std::shared_ptr<DTS::EmergencyCall>               m_dtsEmergencyCall;
+
+  qint64 m_curMSecSinceEpoch = 0;
+  int                                               m_exerciseId;
+  NGL::INGLLogger          &m_logger;
+};
+
+}