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/Map/bounding_box.h

@@ -0,0 +1,85 @@
+/**
+  * @RDE_HEADER@
+  * Interface of AbstractMapObject
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  */
+
+#pragma once
+
+// Own
+#include "situation_map_types.h"
+#include "situation_map_utils.h"
+#include <situation_map_export.h>
+
+// Qt
+
+
+//----------------------------------------------------------------------------
+namespace SituationMap
+{
+
+class SITUATIONMAP_EXPORT BoundingBox
+{
+public:
+  enum class ExtentType {Undefined, Sim, Pixel};
+  static QString toString(BoundingBox::ExtentType value);
+
+public:
+  explicit BoundingBox(ExtentType extentType = ExtentType::Undefined);
+  explicit BoundingBox(ExtentType extentType, const Point3D &center, double width = 0, double height = 0); ///< relative to BasePoint
+
+  void reset();
+
+  ExtentType extentType() const;
+  void setExtentType(ExtentType extentType);
+
+  bool isValid() const;
+
+  Point3D center() const;
+
+  double width() const;              ///< interpret values depending on type
+  double height() const;             ///< interpret values depending on type
+
+  Point3D topLeft() const;           ///< use quadrant 1
+  Point3D topRight() const;          ///< use quadrant 1
+  Point3D bottomLeft() const;        ///< use quadrant 1
+  Point3D bottomRight() const;       ///< use quadrant 1
+
+  Point3D centerRight() const;       ///< use quadrant 1
+
+  PositionCont positions() const;
+
+
+  QString toString() const;
+
+protected:
+  ExtentType  m_extentType = ExtentType::Undefined;   ///< relevant for width and height
+
+  Point3D     m_center;                               ///< simCoordinates
+
+  double      m_width;                                ///< simCoordinates or pixel
+  double      m_height;                               ///< simCoordinates or pixel
+};
+
+
+
+
+//-----------------------------------------------------------------------------
+// output operator:
+//-----------------------------------------------------------------------------
+/**
+ * @brief Output operator
+ * @param stream used to stream into.
+ * @param value to be streamed.
+ * @return appended stream.
+ */
+SITUATIONMAP_EXPORT std::ostream &operator<< (std::ostream   &stream,
+                                              const BoundingBox &value);
+SITUATIONMAP_EXPORT std::ostream &operator<< (std::ostream   &stream,
+                                              const BoundingBox::ExtentType &value);
+
+
+} // namespace SituationMap
+