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/geometry.cpp

@@ -0,0 +1,75 @@
+/**
+  * @RDE_HEADER@
+  * Class Geometry
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  */
+
+// Own
+#include "geometry.h"
+#include <cmath>
+
+//----------------------------------------------------------------------------
+namespace SituationMap
+{
+
+
+QList<QPointF> Geometry::createCircle(const QPointF &center, qreal radius, int steps)
+{
+  QList<QPointF> circle;
+  circle.reserve(steps);
+
+  if (steps < 10)
+    steps = 10;
+  for (int i = 0; i < 360; i += (360 / steps))
+  {
+    double winkel = i * M_PI / 180.0;
+    circle << (center + QPointF(cos(winkel) * radius, sin(winkel) * radius));
+  }
+  circle << circle.value(0); // 'close' the circle
+  //  circle.translate(center);
+  return circle;
+}
+
+
+QList<QPointF> Geometry::createArcSegment(const QPointF &center, qreal radius,
+                                          double startAngle_degree,
+                                          double angleOffset_clockwise_degree,
+                                          int stepsPer360)
+{
+  QList<QPointF> points;
+
+  if (stepsPer360 < 10)
+    stepsPer360 = 10;
+
+  startAngle_degree *= -1.0;
+  startAngle_degree += 90;
+
+  // normalize
+  startAngle_degree            = fmod(startAngle_degree, 360);
+  angleOffset_clockwise_degree = fmod(angleOffset_clockwise_degree, 360);
+
+  // steps
+  int steps = fabs(angleOffset_clockwise_degree) * stepsPer360 / 360;
+  points.reserve(steps + 1);
+
+  double startAngle_rad        = startAngle_degree            * M_PI / 180.0;
+  double angleOffset_right_rad = angleOffset_clockwise_degree * M_PI / 180.0;
+  for (int i = 0; i < steps; ++i)
+  {
+    //                                 '-' to go clockwise:
+    double winkel_rad = (startAngle_rad - (i * angleOffset_right_rad / steps));
+    points << (center + QPointF(cos(winkel_rad) * radius, sin(winkel_rad) * radius));
+  }
+  // calculate very last iteration (independent from 'steps'):
+  double winkel_rad = (startAngle_rad - (angleOffset_right_rad));
+  points << (center + QPointF(cos(winkel_rad) * radius, sin(winkel_rad) * radius));
+
+  return points;
+}
+
+
+
+} // namespace SituationMap
+