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.cpp

@@ -0,0 +1,84 @@
+/**
+  * NgsHandler for HighLevelArchitecture
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  * Created by Christian Ehrlicher, SLSE, 2017-04-07
+  */
+
+#include "ngs_handler.h"
+#include "ngs_connector.h"
+#include <Common/logger.h>
+#include <Common/settings.h>
+
+#include <QCoreApplication>
+#include <QHostInfo>
+
+namespace HighLevelArchitecture
+{
+
+NgsHandler::NgsHandler(QObject *parent)
+  : QObject(parent)
+  , m_ddsHandler(nullptr)
+  , m_logger(getLogger("NgsHandler"))
+{}
+
+NgsHandler::~NgsHandler()
+{
+  m_ppmHandler = nullptr;
+  m_aesHandler = nullptr;
+  m_ngsConnector = nullptr;
+  m_ddsHandler = nullptr;
+}
+
+bool NgsHandler::init(const std::shared_ptr<DdsHandler> &ddsHandler)
+{
+  // initialize DDS
+  m_ddsHandler = ddsHandler;
+
+  QMap<ngs::IObserver::ProtocolType, QString> protToStr;
+  protToStr.insert(ngs::IObserver::ProtocolType::DIS, QStringLiteral("DIS"));
+  protToStr.insert(ngs::IObserver::ProtocolType::HLA, QStringLiteral("HLA"));
+  protToStr.insert(ngs::IObserver::ProtocolType::CORBANOTIFY, QStringLiteral("CORBA"));
+
+  ngs::IObserver::ProtocolType protocol = Settings::hlaProtocol();
+
+  INFO_LOG(m_logger) << "Protocol = " << protToStr.value(protocol, QStringLiteral("UNKNOWN"));
+
+  m_ngsConnector = /* (protocol == ngs::IObserver::ProtocolType::DIS) ?
+                   std::make_shared<NgsConnectorDis>(Settings::federationName(), this) : */
+                   std::make_shared<NgsConnector>(Settings::federationName(), this);
+
+  connect(m_ngsConnector.get(), &NgsConnector::firstTickFinished,
+          this, &NgsHandler::onFirstTickFinished, Qt::UniqueConnection);
+
+  return m_ngsConnector->initialize(protocol, QHostInfo::localHostName().toUpper(), QCoreApplication::applicationDirPath());
+}
+
+bool NgsHandler::isConnectedToHla() const
+{
+  return m_ngsConnector && m_ngsConnector->canPublishData();
+}
+
+void NgsHandler::onFirstTickFinished()
+{
+  m_ppmHandler = std::make_shared<PpmHandler>(this);
+  m_aesHandler = std::make_shared<AesHandler>(this);
+  if (!m_ppmHandler->init())
+    ERROR_LOG(m_logger) << "Could not init ppm handler - not able to publish participants to HLA";
+  if (!m_aesHandler->init())
+    ERROR_LOG(m_logger) << "Could not init ppm handler - not able to publish area effect simulations to HLA";
+
+  emit firstTickFinished();
+
+  connect(m_ppmHandler.get(), &PpmHandler::externalEquipmentNumberAdded,
+          this, &NgsHandler::externalEquipmentNumberAdded);
+  connect(m_ppmHandler.get(), &PpmHandler::externalEquipmentNumberRemoved,
+          this, &NgsHandler::externalEquipmentNumberRemoved);
+
+  connect(this, &NgsHandler::participantInitRequest, m_ppmHandler.get(), &PpmHandler::participantInitRequest);
+  connect(this, &NgsHandler::participantBiteRequest, m_ppmHandler.get(), &PpmHandler::participantBiteRequest);
+  emit ngsHandlerReady();
+}
+
+} // namespace HighLevelArchitecture