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/ConfigX/main.cpp

@@ -0,0 +1,53 @@
+#include "configurator.h"
+
+#include <unistd.h>
+
+#include <QApplication>
+#include <QMessageBox>
+#include <QProcess>
+#include <QDebug>
+
+
+int main(int argc, char **argv)
+{
+  QApplication app(argc, argv);
+
+  QStringList arguments = app.arguments();
+
+  if (arguments.count() < 2)
+  {
+    qWarning() << "usage:" << arguments.at(0)
+               << "<project name (" << Configurator::projectNames().join(QStringLiteral(", ")) << ")>";
+    return -1;
+  }
+
+  QString projectName = arguments.at(1);
+  if (!Configurator::projectNames().contains(projectName))
+  {
+    QMessageBox::critical(nullptr, QString(),
+                          QStringLiteral("Unknown project. Available project names: %1").arg(
+                            Configurator::projectNames().join(QStringLiteral(", "))));
+    return -2;
+  }
+
+  bool isDebug = (arguments.count() > 2 && arguments.at(2) == QStringLiteral("debug"));
+
+  if (!isDebug)
+  {
+    // restart if not root
+    uid_t uid = getuid();
+
+    if (uid != 0) // root
+    {
+      QProcess::startDetached(QStringLiteral("xgd-su -c %1 %2").arg(arguments.at(0), projectName));
+      //qWarning() << "wrong uid" << uid;
+      return 0;
+    }
+  }
+
+
+  Configurator *c = new Configurator(projectName);
+  c->show();
+
+  return app.exec();
+}