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/Common/LtsNotification/lts_notification.cpp

@@ -0,0 +1,92 @@
+// TODO: hdr
+
+#include "lts_notification.h"
+#include "lts_notification_ctl.h"
+
+#include <QIcon>
+
+
+namespace LtsNotification
+{
+
+LtsNotification::LtsNotification(LtsNotificationController *ctl)
+  : QObject()
+  , m_controller(ctl)
+{
+  connect(ctl, &LtsNotificationController::destroyed,
+          this, &LtsNotification::slotCtlDestroyed);
+}
+
+
+LtsNotification::~LtsNotification()
+{
+  delete m_controller;
+}
+
+
+void LtsNotification::setIcon(const QIcon& icon)
+{
+  m_controller->setIcon(icon);
+}
+
+
+void LtsNotification::setAction(const std::function<void(void)> &action)
+{
+  m_controller->setAction(action);
+}
+
+
+void LtsNotification::setToolTip(const QString &toolTip)
+{
+  m_controller->setToolTip(toolTip);
+}
+
+
+const QString &LtsNotification::tooltip() const
+{
+  return m_controller->tooltip();
+}
+
+
+void LtsNotification::setCount(const int count)
+{
+  m_controller->setCount(count);
+}
+
+void LtsNotification::setEnabled(bool enable)
+{
+  m_controller->setEnabled(enable);
+}
+
+void LtsNotification::setBackground(const int r, const int g, const int b)
+{
+  m_controller->setBackground(r, g, b);
+}
+
+
+//void LtsNotification::setToolTip()
+//{
+
+//}
+
+
+//void LtsNotification::setVisible()
+//{
+
+//}
+
+
+//void LtsNotification::setMenu()
+//{
+
+//}
+
+
+void LtsNotification::slotCtlDestroyed(QObject *obj)
+{
+  (void)obj;
+
+  m_controller = nullptr;
+}
+
+} // namespace LtsWidgets