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/DotMatrixDisplay/debugmessages.cpp

@@ -0,0 +1,60 @@
+/**
+  * @RDE_HEADER@
+  * Pop-Up-Window, shows the Debug-Log
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  * Created by Florian Schult, SLSE, 18. Mar 2016
+  */
+#include "debugmessages.h"
+#include "ui_debugmessages.h"
+
+#include <QDateTime>
+#include <QMessageBox>
+
+
+DebugMessages::DebugMessages(QWidget *parent)
+  : NGLDialog(parent)
+  , m_ui(new Ui::DebugMessages)
+{
+  m_ui->setupUi(this);
+
+  connect(m_ui->nglDialogButtonBox, &NGLDialogButtonBox::onClose,
+          this, &DebugMessages::hide);
+  connect(m_ui->nglDialogButtonBox, &NGLDialogButtonBox::onReset,
+          m_ui->tbMain, &QTextBrowser::clear);
+}
+
+DebugMessages::~DebugMessages()
+{
+  delete m_ui;
+}
+
+void DebugMessages::onMessage(int port, const QString &msg, const MsgLvl &lvl)
+{
+  QString color;
+  switch (lvl)
+  {
+  case MSGLVL_DEBUG:
+  case MSGLVL_TRACE:
+  case MSGLVL_INFO:
+  default:
+    color = QStringLiteral("black");
+    break;
+  case MSGLVL_WARNING:
+    color = QStringLiteral("orange");
+    break;
+  case MSGLVL_ERROR:
+  case MSGLVL_FATAL:
+    color = QStringLiteral("red");
+    break;
+  }
+
+  // Output to the to the Debug-Window
+  m_ui->tbMain->append(QStringLiteral("<div style='color:%1'>%2\t \t| %3\t| %4 %6: %5</div>")
+                       .arg(color, QDateTime::currentDateTime().toString(), levelName(lvl), tr("port"), msg)
+                       .arg(port));
+
+  if (lvl == MSGLVL_FATAL)
+    QMessageBox::warning(this, tr("Error"), msg);
+}