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/SideBar/side_bar.h

@@ -0,0 +1,102 @@
+/**
+  * @RDE_HEADER@
+  * SideBar
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  * Created by Norbert Thoden, SLSE, 2015-01-19
+  */
+
+#pragma once
+
+// Own
+#include "side_bar_export.h"
+#include "side_bar_item.h"
+#include <Common/situation_map_logging.h>
+
+// Qt
+#include <QDialog>
+
+class QModelIndex;
+class QStandardItem;
+
+//----------------------------------------------------------------------------
+namespace SituationMap
+{
+
+// forward:
+class Map;
+
+
+// using baseclass QDialog -> with background / no transparency
+// using baseclass QWidget -> no background / will be transparent
+class SIDEBAR_EXPORT SideBar : public QDialog
+{
+  using BaseClass = QDialog;
+
+  Q_OBJECT
+
+public:
+  static QImage createImage(const QColor &fgColor
+                            , const QColor &bgColor
+                            , int size);
+
+  static QIcon createIcon(const QColor &fgColor
+                          , const QColor &bgColor
+                          , int size);
+
+
+  explicit SideBar(QWidget *parent = nullptr);
+  virtual ~SideBar();
+
+  // Animation regarding position:
+  virtual void setAnimationDuration(int msecs);
+  virtual void setInvisiblePosition(const QPoint &invisiblePos);
+  virtual void setVisiblePosition(const QPoint &visiblePos);
+
+  virtual void showAnimated();
+  virtual bool isCurrentlyShowing();
+
+  virtual void hideAnimated();
+  virtual bool isCurrentlyHiding();
+
+  virtual bool addCheckableItem(SideBarItem *item);
+
+  virtual bool addWidget(QWidget *widget);
+
+signals:
+  void dataChanged();
+  void closeRequest();
+
+  void positionString(bool onOff);
+
+
+protected Q_SLOTS:
+  void onItemChanged(QStandardItem *item);
+  void onAnimationOnFinished();
+  void onAnimationOffFinished();
+  void onClicked(const QModelIndex &index);
+
+  void onAnimationStarted();
+  void onAnimationFinished();
+
+
+private:
+  bool initAppearanceToSideBar(bool toSideBar = true);
+  bool initModel();
+
+private:
+  class Private;
+  /**
+      * The private d-pointer to not break BC when changing internals of this class
+     */
+  Private *d = nullptr;
+
+  LOGGER_T m_logger;      ///< Interface of the Logging-Facility
+
+};
+
+
+
+} // namespace SituationMap
+