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/VideoImport/main.cpp

@@ -0,0 +1,88 @@
+/**
+  * @RDE_HEADER@
+  * DDS View -> The "LogView" for DDS
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  */
+
+// #include "nglsettings.h"
+#include "mainwindow.h"
+
+#include <LtsCommandLineParser/LtsCommandLineParser.h>
+#include <NGLLogger/INGLLogger.h>
+//#include <nglsettings/nglsettings_settings.h>
+#include <nglapplication/nglapplication.h>
+#include <LtsPluginManager/lts_plugin_loader.h>
+#include <PluginInterfaces/style_plugin_interface.h>
+
+//#include <QtCore/QSettings>
+//#include <QInputDialog>
+//#include <QUrl>
+
+
+class CmdLineParser : public LtsCommandLineParser::LtsCommandLineParser
+{
+public:
+  CmdLineParser() : LtsCommandLineParser::LtsCommandLineParser(ProvideCommandLineParameterOptions(LtsCommandLineParser::CreateDomainIdFromIp |
+                                                                                                    LtsCommandLineParser::DomainId |
+                                                                                                    LtsCommandLineParser::ExerciseId |
+                                                                                                    LtsCommandLineParser::TcpConnectionUrl))
+  {}
+  const char *langCode() const { return m_langCode.data(); }
+
+  bool init()
+  {
+    setDomainId(-1);
+    QCommandLineOption langCodeOption(QStringList() << QLatin1String("l") << QLatin1String("langCode"),
+                                      QLatin1String("Language."),
+                                      QLatin1String("en_US|de_DE"),
+                                      QLatin1String("en_US"));
+    addOption(langCodeOption);
+
+    if (!LtsCommandLineParser::init())
+      return false;
+
+    if (isSet(langCodeOption))
+      m_langCode = value(langCodeOption).toLatin1();
+
+    return true;
+  }
+
+private:
+  QByteArray m_langCode;
+};
+
+int main(int argc, char *argv[])
+{
+  NGLApplication app(argc, argv);
+  app.createLogger("VideoImporter", "log4cxx_videoimporter.props");
+  NGL::INGLLogger &logger = app.baseLogger();
+  QCoreApplication::setApplicationName(QLatin1String("Video Importer"));
+  QCoreApplication::setOrganizationName(QLatin1String("RDE"));
+
+  LtsPluginManager::LtsPluginLoader::getInstance()->loadPlugins(LtsPluginManager::PluginType::STYLE, nullptr
+                                                                , QStringList() << QStringLiteral("rme.light")); // load style plugin
+
+  CmdLineParser   options;
+  if (!options.init())
+    return -1;
+
+  //  NGL::Settings settings(app.organizationName(), app.applicationName());
+
+  STARTUP_LOG(logger);
+
+//  NGL::init_translator(options.langCode());
+
+  MainWindow *mw = new MainWindow();
+
+  mw->show();
+
+  app.setQuitOnLastWindowClosed(true);
+
+  int retval = app.exec();
+
+  SHUTDOWN_LOG(logger);
+
+  return retval;
+}