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/sidc_symbol.h

@@ -0,0 +1,158 @@
+/**
+**
+** @RDE_HEADER@
+** Definition of transient map objects for use while rubberbanding is done
+** $Id$
+** $HeadURL$
+** $Author$
+**
+** -----------------------------------------------------------------------------------------------
+**
+** 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 .........:
+**
+**   29.09.2015, JT  : First edition for use with Qt5
+**
+** -----------------------------------------------------------------------------------------------
+*/
+
+
+#pragma once
+
+
+#include "abstract_map_object.h"
+
+#include "line_style.h"
+#include "fill_style.h"
+
+#include <QString>
+
+
+namespace SituationMap
+{
+
+
+
+/**
+  @class SIDC_Symbol SIDC_Symbol.h
+  The class \c SIDC_Symbol creates a tactical symbol due a sidc code. In distinction to the class
+  \c Participant the \c SIDC_Symbol is not limited to point features. The sidc implies the kind of
+  geometry (point, polyline or polygon) of the symbol feature, the number of positions to construct the
+  symbol and the way of interpreting the positions.
+
+  \see Participant
+*/
+class SITUATIONMAP_EXPORT SidcSymbol : public virtual AbstractMapObject
+{
+
+public:
+
+  /**
+    @name Construction & Destruction
+    @{
+  */
+  SidcSymbol() : AbstractMapObject()           {}       // Workaround VS2015 bug "= default;" --> gives a crash here
+  virtual ~SidcSymbol()                        = default;
+
+  SidcSymbol(const SidcSymbol &other)       = delete;
+  SidcSymbol &operator=(SidcSymbol &other) = delete;
+  /** @} */
+
+  /** \name Positions
+   * Set positions of the object. Could be either a single and multi point feature.
+   */
+  //@{
+  virtual PositionCont positions() const = 0;
+  virtual void setPositions(const PositionCont &posCont) = 0;
+  //@}
+
+  /** \name LineStyle
+   * See AbstractMapObject for details.
+   */
+  //@{
+  virtual LineStyle lineStyle() const = 0;
+  virtual LineStyle &rLineStyle() = 0;
+  virtual void setLineStyle(const LineStyle &lineStyle) = 0;
+  //@}
+
+
+  /** \name FillStyle
+   * See AbstractMapObject for details.
+   */
+  //@{
+  virtual FillStyle fillStyle() const = 0;
+  virtual FillStyle &rFillStyle() = 0;
+  virtual void setFillStyle(const FillStyle &FillStyle) = 0;
+  //@}
+
+  /**
+   * @name sidc
+   * Returns the  code of the symbol
+   */
+  virtual const QString &sidc() const = 0;
+
+  /**
+   * @name setSidc
+   * Defines the code of the symbol. Alternatively the \c AbstractObject::symbol and \c AbstractObject::setSymbol functions can be used.
+   * @see defineSymbol, AbstractObject::symbol, AbstractObject::setSymbol, SymbolData
+   */
+  virtual void setSidc(const QString &) = 0;
+
+  /**
+   * @name color
+   * Provides the color of the symbol if set with \c setColor. Default is QColor(0,0,0,0)
+   * @attention In current release using user defined colors for symbols are not implemented.
+   * @see setColor
+   */
+  virtual const QColor &color() const = 0;
+
+  /**
+   * @name setColor
+   * @brief Overrides the color setting of the symbol.
+   * Generally the color setting is defined by sidc. With \c setColor this definition will be overwritten. Valid color values
+   * have an alpha value greater than 0. Otherwise the sidc definition will be used. The default is QColor(0,0,0,0)
+   * @attention  In current release using user defined colors for symbols are not implemented.
+   * @see color
+   */
+  virtual void setColor(const QColor &color = QColor(0, 0, 0, 0)) = 0;
+
+  /**
+   * @name attributeMap
+   * Returns the attribute map of the symbol.
+   */
+  virtual const QMap<QString, QVariant> &attributeMap() const = 0;
+
+  /**
+   * @name setAttributeMap
+   * Defines the attribute map of the symbol to support additional drawing attributes. An attribute is a pair of name and value.
+   * Attributes are used to specify additional properties like width of a corridor or radius of a circle.
+   * Alternatively the \c AbstractObject::symbol and \c AbstractObject::setSymbol functions can be used.
+   * @see defineSymbol, AbstractObject::symbol, AbstractObject::setSymbol, SymbolData
+   */
+  virtual void setAttributeMap(const QMap<QString, QVariant> &attrMap) = 0;
+
+  /**
+   * @name defineSymbol
+   * Convenience function to define a symbol
+   * @attention In current release using user defined colors for symbols are not implemented. The color parameter is for further use only.
+   * @see setSidc, setAttributeMap, setColor, AbstractObject::symbol, AbstractObject::setSymbol, SymbolData
+   */
+  virtual void defineSymbol(const QString &sidc,
+                            const PositionCont &posCont,
+                            const QMap<QString, QVariant> &attrMap,
+                            const QColor &color = QColor(0, 0, 0, 0)) = 0;
+
+}; /* SidcSymbol */
+
+} // namespace SituationMap
+