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/DdsView/sequences/tabsequencewidget.cpp

@@ -0,0 +1,44 @@
+/**
+  * @RDE_HEADER@
+  * widget for creating a tab view of dds sequences
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  * Created by Jens Heilmann, SLTE, 2021-05-17
+  */
+#include "tabsequencewidget.h"
+
+#include <QTabBar>
+#include <QTabWidget>
+#include <QToolButton>
+
+TabSequenceWidget::TabSequenceWidget(const RwMode &readOnly,
+                                     const QString &name,
+                                     const dds::core::xtypes::DynamicType &contentType,
+                                     NGL::INGLLogger &logger,
+                                     QWidget *parent)
+  : AbstractSequenceWidget(readOnly, name,contentType, logger, parent)
+  , m_twSequences(new QTabWidget(this))
+{
+  QVBoxLayout *vboxLayout = new QVBoxLayout(this);
+  vboxLayout->addWidget(m_twSequences);
+
+  m_twSequences->setCornerWidget(pbAddMember());
+  pbAddMember()->setFixedSize(m_twSequences->tabBar()->size());
+  pbAddMember()->setIconSize(m_twSequences->tabBar()->size());
+}
+
+TabSequenceWidget::~TabSequenceWidget()
+{
+  delete m_twSequences;
+}
+
+void TabSequenceWidget::setupMemberWidget(QWidget *child, QToolButton *pbChild, const QString &objectName)
+{
+  int index = m_twSequences->addTab(child, objectName);
+  m_twSequences->tabBar()->setTabButton(index, QTabBar::RightSide, pbChild);
+
+  connect(child, &QWidget::objectNameChanged, this, [child, this] (QString text) {
+    m_twSequences->setTabText(m_twSequences->indexOf(child), text);
+  });
+}