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/MapImpl/map_layer.h

@@ -0,0 +1,94 @@
+/**
+  * @RDE_HEADER@
+  * MapLayer
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  */
+
+#pragma once
+
+// Own
+#include <Map/situation_map_types.h>
+#include <Common/situation_map_logging.h>
+
+//----------------------------------------------------------------------------
+namespace SituationMap
+{
+
+class MapImpl;
+
+
+class MapLayer
+{
+public:
+
+  explicit MapLayer(const QString &logicalName = QString(),
+                    LayerType layerType = LayerType::Undefined);
+
+  bool isValid() const;
+
+  // for some read-only values :
+  QString name() const;
+  LayerType type() const;
+  // : for some read-only values
+
+protected:
+  QString                       m_name;
+  LayerType                     m_layerType        = LayerType::Undefined;
+
+};
+
+/**
+ * @brief The MapLayerOrderedList class will store an ordered List of the MapLayer.
+ * The List can be used to get the orderedList of layernames as well as
+ * control the parameters like on/off, brightness etc.
+ */
+class MapLayerOrderedList final : public QObject
+{
+  Q_OBJECT
+  using BaseClass = QObject;
+
+public:
+  MapLayerOrderedList()  = default;
+  ~MapLayerOrderedList() = default;
+
+
+  /**
+   * @brief addLayer add Layername. Will NOT be added if name already exists (regardless layerType)
+   * !All LayerType::Basemap will below all other!
+   * @param name Layername to be added. Must be unique!
+   * @param layerType layerType to be added (Undefined is NOT allowed)
+   * @return true on success, otherwise false
+   */
+  bool          addLayer(const QString &name, LayerType layerType);
+  bool          contains(const QString &name, LayerType layerType) const;
+  MapLayer      getLayer(const QString &name) const;
+  bool          removeLayer(const QString &name);  // layername has to be unique
+  int           count() const;
+  int           count(LayerType layerType) const;
+
+  /**
+   * @brief Order layer according new list
+   * @param orderedLayernamesReq requested new order
+   * @param bRequestedOrderIsValid if set just a check will be performed. The result bool contains the check result.
+   * @return true on success, otherwise false
+   */
+  bool          orderLayerTo(const QStringList &orderedLayernamesReq, bool *bRequestedOrderIsValid = nullptr);
+
+
+  QStringList   layerNamesOrdered() const;
+  QStringList   layerNamesOrdered(LayerType layerType) const;
+
+
+protected:
+  QStringList         layernamesOfType(const QStringList &layernames, LayerType layerType);
+  QStringList         layernamesOfTypeOther(const QStringList &layernames);
+  QList<MapLayer>     m_mapLayerList;    ///< using logical layernames
+};
+
+
+
+} // namespace SituationMap
+
+