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/MapObjects/virtual_mine.h

@@ -0,0 +1,111 @@
+/**
+  * @RDE_HEADER@
+  * Interface of VirtualMine
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  */
+
+#pragma once
+
+#include "abstract_multi_point_map_object.h"
+#include <Map/abstract_effect_simulation.h>
+
+//----------------------------------------------------------------------------
+namespace SituationMap
+{
+
+/**
+ * @brief The ChemicalAgent class supports different agent types.
+ */
+class VirtualMine : public virtual AbstractMultiPointMapObject, public virtual AbstractEffectSimulation
+{
+
+public:
+
+  /* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+  * Don't use "= default" because of bug in VS2015 JT 2016/11/7
+  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+  VirtualMine() : AbstractMultiPointMapObject(), AbstractEffectSimulation() {;}  ///< Contructor
+
+  virtual ~VirtualMine() = default;  ///< Destructor
+
+
+  /*! \name Subsidiary polyline/polygons */
+  //@{
+  /**
+   * @brief Get subsidiary line with key.
+   * @param key to be retrieved.
+   * @return subsidiary line at index
+   */
+  virtual PositionCont subsidiaryLine(int key) const = 0;
+
+  /**
+   * @brief Set subsidiary line with key.
+   * @param key to be set.
+   * @param positions subsidiary line to be set.
+   */
+
+  struct OptionalData
+  {
+    // ctor
+    OptionalData() {}
+    // member
+    bool closed{false};
+    QSharedPointer<LineStyle> lineStyle; // default is 'empty', do not honor
+    QSharedPointer<FillStyle> fillStyle; // default is 'empty', do not honor
+  };
+
+//  virtual void setSubsidiaryLine(int key, const PositionCont &positions, bool clo = false) = 0;
+  virtual void setSubsidiaryLine(int key, const PositionCont &positions, const OptionalData &optData = OptionalData()) = 0;
+
+  /**
+   * @brief Get a list of keys in use.
+   * @return List of keys in use.
+   */
+  virtual QList<int> subsidiaryKeysInUse() = 0;
+
+  /**
+   * @brief Remove one subsidiary line.
+   * @param key to be removed.
+   */
+  virtual void removeSubsidiaryLine(int key) = 0;
+
+  /**
+   * @brief Remove all subsidiaryPositions.
+   */
+  virtual void removeSubsidiaryLines() = 0;
+  //@}
+
+  /*! \name 3D marker / SimpleMarkerSceneSymbol (via renderer) */
+  //@{
+  virtual bool has3DMarkerRenderer() const = 0;
+  virtual void set3DMarkerRenderer(const Point3D &markerOrigin, const QVariantMap &attribMap) = 0;
+  //@}
+
+  /*! \name 3D marker / SimpleMarkerSceneSymbol (explicit symbol) */
+  //@{
+  struct SceneSymbolData
+  {
+    // ctor
+    SceneSymbolData() {}
+    // member
+    Point3D markerOrigin;
+    QColor color{Qt::gray};
+    double radius{1.0};
+
+    bool cone{false}; // cone - sphere
+    double heading{0.0};
+    double pitch{0.0};
+    double roll{0.0};
+  };
+
+  virtual bool has3DMarkerSceneSymbol() const = 0;
+  virtual void set3DMarkerSceneSymbol(const Point3D &markerOrigin, const SceneSymbolData &sceneSymbolData) = 0;
+  //@}
+};
+
+
+
+
+} // namespace SituationMap