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/DDS/DdsUnitTests/generic_data_tests.h

@@ -0,0 +1,76 @@
+/**
+  * @RDE_HEADER@
+  * Unit test for DDS/Generic
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  * Created by Hanna E. Rathje, SLSE, 2015-07-24
+  */
+#pragma once
+
+#include <QObject>
+
+#include "initialisation.h"
+
+#include <DdsUnitTests/ddsut_dtc_types.h>
+#include <DdsUnitTests/ddsut_dts_types.h>
+
+#include <DDS/Generic/subscriber_listener.h>
+#include <LtsUtilsCore/data_modification_enum.h>
+
+namespace NGL
+{
+  class INGLLogger;
+}
+
+class GenericDataTests : public DDSGeneric::SubscriberListenerCallback
+{
+  Q_OBJECT
+
+public:
+  GenericDataTests();
+
+private Q_SLOTS:
+  void initTestCase();
+  void initDRTestCase();
+  void initDWTestCase();
+  void dataWriterTestCase();
+  void dataReaderTestCase();
+  void deleteDataReaderTestCase();
+  void cleanupTestCase();
+
+protected:
+  void droDataAvailable(const std::string &topicType, const std::string &topicName) override;
+  void noWriterAnymore(const std::string &topicType, const std::string &topicName) override
+  {
+    Q_UNUSED(topicType);
+    Q_UNUSED(topicName);
+  }
+
+  void writerAvailable(const std::string &topicType, const std::string &topicName) override
+  {
+    Q_UNUSED(topicType);
+    Q_UNUSED(topicName);
+  }
+
+  void processData(const DdsUnitTests::TestParticipant &data, const dds::sub::SampleInfo &si);
+  void processData(const DdsUnitTests::SpatialData &data, DataModification modType);
+
+private:
+  Initialisation                *m_init = nullptr;
+
+  DTS::DwoTestParticipant       *m_dataWriter = nullptr;
+  DTC::DroTestParticipant       *m_dataReader = nullptr;
+
+  DTS::DwoSpatialData           *m_dataWriterSd = nullptr;
+  DTC::DroSpatialData           *m_dataReaderSd = nullptr;
+
+  DdsUnitTests::SpatialData      m_spatialData;
+  DdsUnitTests::TestParticipant  m_testPart;
+
+  NGL::INGLLogger               &m_logger;
+
+};
+
+
+