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/Rubberbands/drawable_line.cpp

@@ -0,0 +1,109 @@
+
+/**
+**
+** @RDE_HEADER@
+** Implementation of line drawables
+** $Id$
+** $HeadURL$
+** $Author$
+**
+** -----------------------------------------------------------------------------------------------
+**
+** Hardware-Environment: Intel-PC
+** Software-Environment: Windows 7, Qt 5.4. ArcGIS 10.2.5
+**
+** Language ........: C++ 11
+**
+** -----------------------------------------------------------------------------------------------
+**
+** Author ...........: Jörg Turla, SPD G, Tel. 3132
+**
+** -----------------------------------------------------------------------------------------------
+**
+** Notes .........:
+**
+**   06.08.2015, JT  : First edition for use with Qt5
+**
+** -----------------------------------------------------------------------------------------------
+*/
+
+#include "drawable_line.h"
+
+#include <QtWidgets/QGraphicsLineItem>
+
+
+namespace SituationMap { namespace RB
+{
+
+   DrawableLine::DrawableLine(Esri::ArcGISRuntime::MapGraphicsView * map)
+      : RubberbandDrawable(map)
+      , _lineItem(nullptr)
+      , _lineStyle()
+      , _dottedLine(false)
+   {
+      _lineItem  = new QGraphicsLineItem();
+      _scene -> addItem( _lineItem );
+
+      makeLineStyle( _dottedLine, _lineStyle );
+      _lineItem -> setPen( _lineStyle );
+
+   } /* DrawableLine::DrawableLine */
+
+
+   DrawableLine::DrawableLine(Esri::ArcGISRuntime::MapGraphicsView * map, QGraphicsScene * scene)
+      : RubberbandDrawable(map, scene)
+      , _lineItem(nullptr)
+      , _lineStyle()
+      , _dottedLine(false)
+   {
+      _lineItem  = new QGraphicsLineItem();
+      _scene -> addItem( _lineItem );
+      makeLineStyle( _dottedLine, _lineStyle );
+      _lineItem -> setPen( _lineStyle );
+
+   } /* DrawableLine::DrawableLine */
+
+   DrawableLine::~DrawableLine()
+   {
+      if (_scene)
+      {
+        if (_lineItem)
+        {
+          _scene->removeItem(_lineItem);
+          delete _lineItem;
+        }
+      }
+      _lineItem = nullptr;
+   } /* DrawableLine::~DrawableLine */
+
+
+   void DrawableLine::setLine( const RubberbandDrawable::RubberbandCoordinate & p1, const RubberbandDrawable::RubberbandCoordinate & p2 )
+   {
+      _lineCoordinates[0]  = p1;
+      _lineCoordinates[1]  = p2;
+      updateGraphic();
+   } /* DrawableLine::setPath */
+
+
+   void  DrawableLine::updateGraphic()
+   {
+      _lineCoordinates[0].mapToScene(_mapView);
+      _lineCoordinates[1].mapToScene(_mapView);
+
+      qreal x1 = _lineCoordinates[0]._sceneCoordinate.x();
+      qreal y1 = _lineCoordinates[0]._sceneCoordinate.y();
+      qreal x2 = _lineCoordinates[1]._sceneCoordinate.x();
+      qreal y2 = _lineCoordinates[1]._sceneCoordinate.y();
+
+      makeLineStyle( _dottedLine, _lineStyle );
+
+      _lineItem -> setLine( x1,y1,x2,y2 );
+      _lineItem -> setPen( _lineStyle );
+      _lineItem -> setVisible( _isVisible );
+
+   } /* DrawableLine::updateGraphic */
+
+   void DrawableLine::adjustCoordinates()           { updateGraphic(); }
+   void DrawableLine::adjustWindow( const QRectF& ) { updateGraphic(); }
+
+} } /* namespace SituationMap::RB */