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/LtsDataView/tree_view.cpp

@@ -0,0 +1,82 @@
+/**
+ * @RDE_HEADER@
+ * A QTreeView with some events catched
+ * $Id$
+ * $HeadURL$
+ * $Author$
+ *
+ * Created by Mike Wille, SLSE, 2016-10-07
+ */
+
+#include "tree_view.h"
+
+#include <QGuiApplication>
+#include <QKeyEvent>
+
+namespace LtsDataView
+{
+
+// needed until QTBUG-78726 is fixed
+void TreeView::dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight,
+                           const QVector<int> &roles)
+{
+  QTreeView::dataChanged(topLeft, bottomRight, roles);
+  if (!m_toolTipPos.isNull() && (roles.isEmpty() || roles.contains(Qt::ToolTipRole)))
+  {
+    if (viewport()->mapToGlobal(m_toolTipPos) != QCursor::pos())
+    {
+      m_toolTipPos = QPoint();
+      return;
+    }
+    const QModelIndex index = indexAt(m_toolTipPos);
+    if (index.row() >= topLeft.row() && index.row() <= bottomRight.row() &&
+        index.column() >= topLeft.column() && index.column() <= bottomRight.column())
+    {
+
+      QHelpEvent he(QEvent::ToolTip, m_toolTipPos, viewport()->mapToGlobal(m_toolTipPos));
+      QTreeView::viewportEvent(&he);
+      m_toolTipPos = QPoint();
+    }
+  }
+}
+
+void TreeView::keyPressEvent(QKeyEvent *event)
+{
+  if (QGuiApplication::keyboardModifiers() == Qt::ControlModifier
+      && event->key() == Qt::Key_C)
+    emit signalCopyToClipBoard(); // queue !
+
+  QTreeView::keyPressEvent(event);
+}
+
+bool TreeView::edit(const QModelIndex &index, EditTrigger trigger, QEvent *event)
+{
+
+  if (trigger == QAbstractItemView::NoEditTriggers)
+  {
+    const QMouseEvent *me = dynamic_cast<QMouseEvent*>(event);
+    if (me && me->buttons().testFlag(Qt::LeftButton))
+      trigger = QAbstractItemView::AllEditTriggers;
+  }
+  return QTreeView::edit(index, trigger, event);
+}
+
+// needed until QTBUG-78726 is fixed
+bool TreeView::viewportEvent(QEvent *event)
+{
+  bool ret = QTreeView::viewportEvent(event);
+  if (event->type() == QEvent::ToolTip)
+  {
+    if (!ret)
+    {
+      QHelpEvent *he = static_cast<QHelpEvent*>(event);
+      m_toolTipPos = he->pos();
+    }
+    else
+      m_toolTipPos = QPoint();
+  }
+  return ret;
+}
+
+
+} // namespace LtsDataView