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/sight_fan.h

@@ -0,0 +1,109 @@
+/* 
+** ----------------------------------------------------------------------------------------------- 
+** 
+** @RDE_HEADER@
+** Implementation of base class for 2D rubberbands
+** $Id$
+** $HeadURL$
+** $Author$
+** 
+** ----------------------------------------------------------------------------------------------- 
+** 
+** Hardware-Environment: Intel-PC
+** Software-Environment: Windows 7, Qt 5.x. ArcGISRuntimeQt 100.2
+**
+** Language ........: C++ 11
+**
+** ----------------------------------------------------------------------------------------------- 
+** 
+** Autor ...........: Nikolaus Hanekamp, SEDG, Tel. 2906 
+**                    Jörg Turla, SPDG, Tel. 3132
+**
+** ----------------------------------------------------------------------------------------------- 
+** 
+** Notices .........: 
+** 
+**   01.02.2005, NH  : Urversion 
+**   15.05.2018, JT  : adapting GeISiR source to SituationMap 
+**
+** ----------------------------------------------------------------------------------------------- 
+*/ 
+ 
+#pragma once
+
+#include <Map/abstract_map_object.h>
+
+
+namespace SituationMap
+{ 
+
+  class ElevationMap; // Forward declaration
+
+
+
+  class SITUATIONMAP_EXPORT SightFan: public virtual AbstractMapObject
+  { 
+     public:
+     
+       SightFan(const SightFan &) = delete;                // copy constructor 
+       SightFan & operator = (const SightFan &) = delete;  // assignment operator
+
+       SightFan() : AbstractMapObject() {;}
+     
+       virtual ~SightFan() = default;
+
+       virtual void initFan( const QPointF &center
+                           , double         centHat
+                           , double         objHat
+                           , double         radius
+                           , double         innerRadius
+                           , double         startAngle
+                           , double         dAngle
+                           , unsigned int   nrFans 
+                           , double         alpha ) = 0;
+
+       virtual void initFan( const Point3D &center
+                           , double         objHat
+                           , double         radius
+                           , double         innerRadius
+                           , double         startAngle
+                           , double         dAngle
+                           , unsigned int   nrFans
+                           , double         alpha ) = 0;
+
+       virtual void setCenter(const QPointF &center) = 0;
+       virtual void setCenter(const Point3D &center) = 0;
+       virtual void setCenter(const QPointF &center, double centerHat ) = 0;
+
+       virtual void setCenterHat(double centerHat) = 0;
+       virtual void setObjectHat(double objHat) = 0;
+
+       virtual void setRadius(double radius) = 0;
+       virtual void setInnerRadius(double radius) = 0;
+       virtual void setStartAngle(double startAngle) = 0;
+       virtual void setdeltaAngle(double dAngle) = 0;
+       virtual void setNoOfFans(double noFans) = 0;
+       virtual void setAlpha(double alpha) = 0;
+
+       virtual QPointF center() const = 0;
+       virtual double  centerHat() const = 0;
+       virtual double  objectHat() const = 0;
+       virtual double  innerRadius() const = 0;
+       virtual double  radius() const = 0;
+       virtual double  startAngle() const = 0;
+       virtual double  dAngle() const = 0;
+       virtual double  alpha() const = 0;
+       virtual unsigned int noOfFans() const = 0;
+
+       virtual void move(const  QPointF &center) = 0;
+
+       virtual void move(const QPointF &center, double centHat, double objHat) = 0;
+
+       virtual void show() = 0;
+       virtual void setFanColor(const QColor & visible, const QColor &invisible, const QColor &undefined) = 0;
+       virtual void setFanColorMark(float colMult) = 0;
+
+  }; // SightFan  
+ 
+} // SituationMap 
+