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/LtsScriptTimeline/indicator.cpp

@@ -0,0 +1,82 @@
+#include "indicator.h"
+#include "ui_indicator.h"
+#include <QTimer>
+
+namespace LtsScriptTimeline
+{
+
+Indicator::Indicator(QWidget *parent)
+  : QWidget(parent)
+  , ui(new Ui::Indicator)
+{
+  ui->setupUi(this);
+
+  connect(ui->splitter, &QSplitter::splitterMoved,
+          this, &Indicator::slotSplitterMoved);
+
+  connect(ui->m_widgetTrackHeader, &TrackHeader::signalHeaderIndicatorTimeChanged,
+          this, &Indicator::signalHeaderIndicatorTimeChanged); // sig on sig
+  connect(ui->m_widgetTrackHeader, &TrackHeader::signalHeaderIndicatorTimeUserChanged,
+          this, &Indicator::signalHeaderIndicatorTimeUserChanged); // sig on sig
+
+  QList<int> sizes;
+  sizes << 100 << 900;
+  ui->splitter->setSizes(sizes);
+
+  QTimer::singleShot(500, this, [this]()
+  {
+    slotSplitterMoved();
+    emit signalHeaderIndicatorTimeUserChanged(ui->m_widgetTrackHeader->indicatorTime());
+    ui->m_widgetTrackHeader->recreatePositionLabels();
+  });
+}
+
+
+Indicator::~Indicator()
+{
+  delete ui;
+}
+
+
+void Indicator::setTools(Tools *tools)
+{
+  ui->m_widgetTrackHeader->setTools(tools);
+}
+
+
+void Indicator::lockIndicator(bool lock)
+{
+  ui->m_widgetTrackHeader->lockIndicator(lock);
+}
+
+
+void Indicator::setIndicatorTime(int time)
+{
+  ui->m_widgetTrackHeader->setIndicatorTime(time);
+}
+
+
+void Indicator::updateMe()
+{
+  ui->m_widgetTrackHeader->updateMe();
+  update();
+}
+
+
+void Indicator::resizeEvent(QResizeEvent *)
+{
+  slotSplitterMoved();
+}
+
+
+void Indicator::slotSplitterMoved()
+{
+  int newSize = ui->m_widgetTrackLabel->width() + ui->splitter->handleWidth();
+
+  if (newSize < 0)
+    newSize = 0;
+
+  emit signalHandleResized(newSize);
+}
+
+} // namespace LtsScriptTimeline