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/LtsTimelineClassic/main.cpp

@@ -0,0 +1,88 @@
+/**
+  * @RDE_HEADER@
+  * example main file for testing purpose
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  * Created by Mike Wille, SLSE, 2014-10-01
+  */
+
+#include "TimelineWidget.h"
+#include "TestTimelineModel.h"
+
+#include <NGLLogger/NGLLoggerBootstrap.h>
+#include <nglapplication/nglapplication.h>
+#include <Services/ProjectDataManagement/pdm_enums.hpp>
+#include <Services/ProjectDataManagement/pdm_translation.h>
+
+#include <time.h>
+#include <QVBoxLayout>
+#include <QPushButton>
+#include <QDebug>
+
+
+LtsTimelineClassic::TestTimelineModel *ttm;
+
+
+void add(qint64 time_offset)
+{
+  qint64 time = 1505292189000;
+  time += time_offset;
+
+  ttm->addTestEvent(new LtsTimelineClassic::Event(0, (int)ProjectDataManagement::EventType_def::Hit, time, 0, 0, 0, 0,
+                                                QStringList() << QStringLiteral("Test"),
+                                                LtsTimelineClassic::Event::drawCustomEventGraphicEllipse, QColor("green"), QString()));
+}
+
+
+int main(int argc, char *argv[])
+{
+  qputenv("TDS_DEVEL", "yes, of course");
+  qWarning() << "LtsTimelineClassicTest";
+  NGLApplication app(argc, argv);
+  app.createLogger("Timeline", "log4cxx_timeline.props");
+
+  STARTUP_LOG(app.baseLogger());
+
+  int ret = 0;
+
+#if 1
+  QWidget *widget = new QWidget();
+  widget->setMinimumWidth(500);
+
+  QVBoxLayout *layout = new QVBoxLayout();
+  widget->setLayout(layout);
+
+  LtsTimelineClassic::TimelineWidget *timelineWidget = new LtsTimelineClassic::TimelineWidget();
+  layout->addWidget(timelineWidget);
+
+  QHBoxLayout *btnLayout = new QHBoxLayout();
+  QWidget *btnLayoutWidget = new QWidget();
+  btnLayoutWidget->setLayout(btnLayout);
+  layout->addWidget(btnLayoutWidget);
+
+  btnLayout->addWidget(new QPushButton(QStringLiteral("Filter"))); // dummy
+  btnLayout->addWidget(new QPushButton(QStringLiteral("CSV Export"))); // dummy
+  btnLayout->addStretch(1);
+
+  widget->show();
+
+  ttm = new LtsTimelineClassic::TestTimelineModel();
+  timelineWidget->setTimelineModel(ttm);
+
+  //QObject::connect(timelineWidget, SIGNAL(signalEventAction(EventGraphic*,int)), ttm, SLOT(slotEventAction(EventGraphic*,int))); // make events clickable
+
+
+
+  add(0);
+  add(100 * 60 * 1000);
+  add(3000 * 60 * 1000);
+
+
+
+  ret = app.exec();
+  SHUTDOWN_LOG(app.baseLogger());
+#endif
+
+  return ret;
+}