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/DBAdministration/main.cpp

@@ -0,0 +1,100 @@
+/*
+ * @RDE_HEADER@
+ * <short description>
+ * $Id$
+ * $HeadURL$
+ * $Author$
+ * Created by Malte Schröder, SLSE, 2016-06-08
+ */
+
+#include "db_administration.h"
+#include "copy_exercise.h"
+#include "settings.h"
+#include <NGLLogger/INGLLogger.h>
+#include <nglapplication/nglapplication.h>
+#include <nglapplication/nglcoreapplication.h>
+#include <ngltranslator/ngltranslator.h>
+#include <LtsCommandLineParser/LtsCommandLineParser.h>
+
+class CmdLineParser : public LtsCommandLineParser::LtsCommandLineParser
+{
+public:
+  CmdLineParser()
+    : LtsCommandLineParser(ProvideCommandLineParameterOptions::None)
+  {
+    addOption({{QStringLiteral("l"), QStringLiteral("lang")},
+               QStringLiteral("Language iso code to use (de_DE, en_GB, en_US)"),
+               QStringLiteral("<locale iso code>")
+              });
+  }
+  QString langIsoCode() const { return value(QStringLiteral("l")); }
+};
+
+int main(int argc, char *argv[])
+{
+  int retval = -1;
+  bool bHeadless = false;
+  for (int i = 1; i < argc; ++i)
+  {
+    if (strcmp(argv[i], "-e") == 0)
+    {
+      bHeadless = true;
+      break;
+    }
+  }
+  QScopedPointer<QCoreApplication> app;
+  app.reset(bHeadless ? dynamic_cast<QCoreApplication*>(new NGLCoreApplication(argc, argv))
+                      : dynamic_cast<QCoreApplication*>(new NGLApplication(argc, argv)));
+  QCoreApplication::setApplicationName(QLatin1String("DBAdministration"));
+  QCoreApplication::setOrganizationName(QLatin1String("RME"));
+
+  NGL::LoggerHandler *lh = dynamic_cast<NGL::LoggerHandler*>(app.data());
+  lh->createLogger("DbAdministration", "log4cxx_dba.props");
+  NGL::INGLLogger &logger = lh->baseLogger();
+
+  // Parse Options
+  CmdLineParser options;
+  if (!options.init())
+    return retval;
+
+  // Set Translation
+  QString langIsoCode = options.langIsoCode();
+  if (langIsoCode.isEmpty())
+    langIsoCode = QLocale::system().name();
+  NGL::setTranslationLocale(langIsoCode.toLatin1());
+
+  DBAdministration::Settings::setIniFile(options.iniFile());
+
+  INFO_LOG(logger) << "ExerciseId: " << options.exerciseId();
+  if (options.exerciseId() <= 0)
+  {
+    QScopedPointer<DBAdministration::DBAdministration> w(new DBAdministration::DBAdministration);
+    if (!w->init())
+      return -2;
+
+    STARTUP_LOG(logger);
+    w->show();
+    QGuiApplication::setQuitOnLastWindowClosed(true);
+    retval = QCoreApplication::exec();
+  }
+  else
+  {
+    DBAdministration::CopyExercise::CopyFor copyFor = DBAdministration::CopyExercise::CopyForEvaluation;
+    QScopedPointer<DBAdministration::CopyExercise> w(new DBAdministration::CopyExercise(DBAdministration::getLogger("CopyExercise"), copyFor));
+    if (!w->init(options.exerciseId(),
+                 DBAdministration::Settings::serverDatabaseHost(),
+                 DBAdministration::Settings::serverDatabaseName(),
+                 DBAdministration::Settings::evaluationDatabaseHost(),
+                 DBAdministration::Settings::evaluationDatabaseName()))
+      return -2;
+
+    STARTUP_LOG(logger);
+    if (!w->doCopy())
+      return -3;
+
+    retval = QCoreApplication::exec();
+  }
+  SHUTDOWN_LOG(logger);
+
+  return retval;
+}