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/Viewer/SituationMap/ModuleTests/sit_map.h

@@ -0,0 +1,58 @@
+/**
+  * @RDE_HEADER@
+  * Moduletest
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  */
+
+#pragma once
+
+// Qwn
+#include <Common/situation_map_logging.h>
+
+
+namespace SituationMap
+{
+class Map;
+}
+
+namespace AdvancedSymbology
+{
+enum class SymbologyType;
+}
+
+
+// Qt
+#include <QDialog>
+
+class SitMap : public QDialog
+{
+  Q_OBJECT
+
+public:
+  SitMap(AdvancedSymbology::SymbologyType symbologyType, QWidget *parent = nullptr);
+  virtual ~SitMap();
+
+  virtual bool isReady();
+
+  SituationMap::Map *map();
+
+
+signals:
+  void mapReady();
+  void mapReadyAndSymbolDictionaryLoaded();
+
+public slots:
+  void onCreateDestroyClicked();
+  void createMap();
+
+
+private:
+  SituationMap::LOGGER_T m_logger;      ///< Interface of the Logging-Facility
+
+  class Private;
+  Private *d = nullptr;
+
+};
+