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/fill_style.h

@@ -0,0 +1,112 @@
+/**
+  * @RDE_HEADER@
+  * FillStyle
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  */
+
+#pragma once
+
+// Own
+#include "situation_map_types.h"
+#include <situation_map_export.h>
+
+
+// Qt
+#include <QColor>
+
+
+//----------------------------------------------------------------------------
+namespace SituationMap
+{
+
+
+
+
+//----------------------------------------------------------------------------
+/**
+ * @brief The FillStyle class contains parameter to fill an area with color and pattern.
+ */
+class SITUATIONMAP_EXPORT FillStyle final
+{
+public:
+
+  /*! \name Construction, Destruction */
+  //@{
+  /**
+   * @brief Constructor
+   */
+  FillStyle() = default;
+
+  /**
+   * @brief Constructor
+   */
+  FillStyle(const QColor &fillColor, FillPattern fillPattern);
+
+  /**
+   * @brief Constructor
+   */
+  explicit FillStyle(FillPattern fillPattern);
+
+  /**
+   * @brief Destructor
+   */
+  ~FillStyle() = default;
+  //@}
+
+
+  /** \name FillColor
+   * Set and get methods.
+   */
+  //@{
+  QColor fillColor() const;
+  void setFillColor(const QColor &fillColor);
+  //@}
+
+  /** \name FillPattern
+   * Set and get methods.
+   */
+  FillPattern fillPattern() const;
+  void setFillPattern(const FillPattern &fillPattern);
+  //@}
+
+
+  /**
+   * @brief operator== Compare two objects
+   * @param other to be compared with
+   * @return true if identical, otherwise false.
+   */
+  bool operator==(const FillStyle &other) const
+  {
+    return ((this->m_fillColor       == other.m_fillColor) &&
+            (this->m_fillPattern     == other.m_fillPattern)
+           );
+  }
+
+  /**
+   * @brief operator!= Compare two objects
+   * @param other to be compared with
+   * @return true if NOT identical, otherwise false.
+   */
+  bool operator!=(const FillStyle &other) const
+  {
+    return !(*this == other);
+  }
+
+private:
+  QColor        m_fillColor   = QColor(125, 125, 125, 125); // gray
+  FillPattern   m_fillPattern = FillPattern::Solid;
+};
+
+
+
+//-----------------------------------------------------------------------------
+// output operator:
+//-----------------------------------------------------------------------------
+SITUATIONMAP_EXPORT  std::ostream &operator<< (std::ostream &stream,
+                                               const FillStyle &value);
+
+
+} // namespace SituationMap
+