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/GraphicalObjects/ellipse_parameters.h

@@ -0,0 +1,95 @@
+/**
+  * @RDE_HEADER@
+  * EllipseParameters
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  */
+
+#pragma once
+
+// Own
+#include <situation_map_export.h>
+
+#include <ostream>
+
+// Qt
+
+
+//----------------------------------------------------------------------------
+namespace SituationMap
+{
+
+
+
+
+//----------------------------------------------------------------------------
+class SITUATIONMAP_EXPORT EllipseParameters
+{
+public:
+
+  static constexpr unsigned int MAX_POINT_COUNT_DEFAULT = 30;
+
+  EllipseParameters() = default;
+
+  float lengthX() const;
+  void setLengthX(float lengthX);
+
+  float lengthY() const;
+  void setLengthY(float lengthY);
+
+  float directionDegree() const;
+  void setDirectionDegree(float directionDegree);
+
+  int maxSegmentLength() const;
+  void setMaxSegmentLength(int value);
+
+  int maxPointCount() const;
+  void setMaxPointCount(int maxPointCount);
+
+  bool isValid() const;
+
+  /**
+   * @brief operator== Compare two objects
+   * @param other to be compared with
+   * @return true if identical, otherwise false.
+   */
+  bool operator==(const EllipseParameters &other) const
+  {
+    return ((this->m_lengthX           == other.m_lengthX) &&
+            (this->m_lengthY           == other.m_lengthY) &&
+            (this->m_directionDegree   == other.m_directionDegree) &&
+            (this->m_maxSegmentLength  == other.m_maxSegmentLength) &&
+            (this->m_maxPointCount     == other.m_maxPointCount)
+           );
+  }
+
+  /**
+   * @brief operator!= Compare two objects
+   * @param other to be compared with
+   * @return true if NOT identical, otherwise false.
+   */
+  bool operator!=(const EllipseParameters &other) const
+  {
+    return !(*this == other);
+  }
+
+
+
+private:
+  float                                         m_lengthX           = 0;
+  float                                         m_lengthY           = 0;
+  float                                         m_directionDegree   = 0;
+  int                                           m_maxSegmentLength  = 10; // meter
+  int                                           m_maxPointCount     = MAX_POINT_COUNT_DEFAULT;
+};
+
+//-----------------------------------------------------------------------------
+// output operator:
+//-----------------------------------------------------------------------------
+SITUATIONMAP_EXPORT std::ostream &operator<< (std::ostream   &stream,
+                                              const EllipseParameters &value);
+
+
+} // namespace SituationMap
+