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/abstractsequencewidget.h

@@ -0,0 +1,127 @@
+/**
+  * @RDE_HEADER@
+  * ABC for creating custom views of dds sequences
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  * Created by Jens Heilmann, SLTE, 2021-05-17
+  */
+
+#pragma once
+
+#ifndef Q_MOC_RUN
+#include <dds/dds.hpp>
+#endif
+
+#include <QGroupBox>
+#include <QList>
+
+#include <detailview.h>
+#include "logger.h"
+
+class QToolButton;
+
+class AbstractSequenceWidget : public QGroupBox
+{
+  Q_OBJECT
+
+public:
+  /**
+   * @brief AbstractSequenceWidget inits pbAddMember and adds logic to it.
+   * @attention pbAddMember must be inserted into a layout
+   * @param readOnly if read only, disable all buttons on creation
+   * @param name
+   * @param contentType
+   * @param logger
+   * @param parent
+   */
+  explicit AbstractSequenceWidget(const RwMode &readOnly,
+                                  const QString &name,
+                                  const dds::core::xtypes::DynamicType &contentType,
+                                  NGL::INGLLogger &logger,
+                                  QWidget *parent = nullptr);
+
+  ~AbstractSequenceWidget();
+
+  /**
+   * @brief setValue set data from dds for widget at index
+   *        if widget not found, createa a new one
+   * @param inner
+   * @param index
+   * @param useOn
+   */
+  virtual void setValue(const dds::core::xtypes::DynamicData &inner,
+                        const uint32_t &index, const QWidget *useOn);
+
+  /**
+   * @brief getValue get data inside widget for dds
+   * @param name
+   * @param data
+   * @param index
+   * @param useOn
+   */
+  virtual void getValue(const QString &name, dds::core::xtypes::DynamicData &data,
+                        const uint32_t &index, const QWidget *useOn) const;
+
+  /**
+   * @brief setMemberCount used by DetailView
+   * @param count
+   */
+  virtual void setMemberCount(int count);
+
+  /**
+   * @brief getMemberCount used by DetailView
+   * @return
+   */
+  virtual uint32_t getMemberCount() const;
+
+protected:
+  /**
+   * @brief logger
+   * @return
+   */
+  virtual NGL::INGLLogger &logger() const;
+
+  /**
+   * @brief pbAddMember
+   * @return
+   */
+  virtual QToolButton *pbAddMember() const;
+
+  /**
+   * @brief getObjectName generates a valid object name given by index
+   * @param index
+   * @return
+   */
+  virtual QString getObjectName(int index) const;
+
+  /**
+   * @brief setupMemberWidget place child and button widget into a layout
+   * @param child
+   * @param pbChild
+   * @param objectName
+   */
+  virtual void setupMemberWidget(QWidget *child, QToolButton *pbChild, const QString &objectName) = 0;
+
+private slots:
+  /**
+   * @brief addMemberWidget create a new button and connect to child
+   * @param member new child
+   */
+  virtual void addMemberWidget(QWidget *member);
+
+  /**
+   * @brief deleteMemberWidget clean up child and reindex other children objectnames
+   * @param member deleted child
+   */
+  virtual void deleteMemberWidget(QObject *member);
+
+private:
+  RwMode                         m_rwMode;
+  QToolButton                   *m_pbAddMember = nullptr;
+  QList<QWidget*>                m_memberList;
+  dds::core::xtypes::DynamicType m_contentType;
+  QString                        m_name;
+  NGL::INGLLogger               &m_logger;
+};
+