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/Tools/DateTimeSyncer/system_caller.cpp

@@ -0,0 +1,118 @@
+/**
+  * SystemCaller to set Time and Date
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  * Created by Patric Karwat, NLE, 07-03-2019
+  */
+#include "system_caller.h"
+#include <QTimer>
+#include <QDateTime>
+
+namespace DateTimeSyncer
+{
+
+SystemCaller::SystemCaller(QObject *parent)
+  : QObject(parent)
+  , m_tcpServer(new TcpServer(this))
+  , m_sockets(QVector<QTcpSocket*>())
+  , m_logger(getLogger("SystemCaller"))
+{}
+
+SystemCaller::~SystemCaller()
+{
+  for (auto socket : qAsConst(m_sockets))
+  {
+    socket->close();
+    socket->deleteLater();
+  }
+
+  m_tcpServer->close();
+
+  delete m_tcpServer;
+}
+
+bool SystemCaller::init(int tcpPort)
+{
+  connect(m_tcpServer, &TcpServer::newConnection, this, &SystemCaller::newConnection);
+  bool result = m_tcpServer->listen(QHostAddress::Any, tcpPort);
+  quint16 actualPort = m_tcpServer->serverPort();
+
+  NOTICE_LOG(m_logger) << "Start listen to port " << actualPort << " result: " << result;
+
+  if (!result)
+    return false;
+
+  return true;
+}
+
+void SystemCaller::newConnection()
+{
+  while (m_tcpServer->hasPendingConnections())
+  {
+    // store socket and connect to signals
+    QTcpSocket *socket = m_tcpServer->nextPendingConnection();
+    connect(socket, &QTcpSocket::readyRead, this, &SystemCaller::readTcp);
+    connect(socket, &QTcpSocket::disconnected, this, &SystemCaller::tcpDisconnected);
+    m_sockets.append(socket);
+
+    NOTICE_LOG(m_logger) << "New TCP-connection on port " << m_tcpServer->serverPort();
+  }
+}
+
+void SystemCaller::readTcp()
+{
+  QTcpSocket *socket = qobject_cast<QTcpSocket *>(sender());
+  if (!socket)
+    return;
+
+  QByteArray ba = socket->readAll();
+  qint64 time = ba.toLongLong();
+  DEBUG_LOG(m_logger) << "New Time " << time;
+
+  QDateTime newDateTime = QDateTime::fromSecsSinceEpoch(time);
+
+  if (newDateTime.isValid())
+  {
+#ifndef WIN32
+    //linux
+    QString string = newDateTime.toString(QStringLiteral("\"yyyy-MM-dd hh:mm:ss\""));
+    QString dateTimeString(QStringLiteral("date  --set="));
+    dateTimeString.append(string);
+    int systemDateTimeStatus = system(dateTimeString.toStdString().c_str());
+    if (systemDateTimeStatus == -1)
+      WARNING_LOG(m_logger) << "Failed to change date time";
+    int systemHwClockStatus = system("/sbin/hwclock -w");
+    if (systemHwClockStatus == -1)
+      WARNING_LOG(m_logger) << "Failed to sync hardware clock";
+#else
+    QString dateString = newDateTime.toString(QStringLiteral("dd-MM-yy"));
+    QString timeString = newDateTime.toString(QStringLiteral("hh:mm:ss"));
+    QString systemDateString(QStringLiteral("date "));
+    QString systemTimeString(QStringLiteral("time "));
+    systemDateString.append(dateString);
+    systemTimeString.append(timeString);
+    int systemDateStatus = system(systemDateString.toLocal8Bit().data());
+    if (systemDateStatus == -1)
+      WARNING_LOG(m_logger) << "Failed to change date";
+    int systemTimeStatus = system(systemTimeString.toLocal8Bit().data());
+    if (systemTimeStatus == -1)
+      WARNING_LOG(m_logger) << "Failed to change date";
+#endif
+
+  }
+}
+
+void SystemCaller::tcpDisconnected()
+{
+  QTcpSocket *socket = qobject_cast<QTcpSocket *>(sender());
+  m_sockets.removeOne(socket);
+}
+
+void SystemCaller::handleTcpError(QAbstractSocket::SocketError error)
+{
+  Q_UNUSED(error)
+  //TODO: TCP-Socket Error handling
+}
+
+} //namespace DateTimeSyncer