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/QLedMatrix/qledmatrix.h

@@ -0,0 +1,99 @@
+/*******************************************************************************
+**
+**  Copyright (C) 2009 Pierre-Etienne Messier <pierre.etienne.messier@gmail.com>
+**                     http://pemessier.hexpresso.org/
+**
+**  This library is free software: you can redistribute it and/or modify
+**  it under the terms of the GNU Lesser General Public License as published by
+**  the Free Software Foundation, either version 3 of the License, or
+**  (at your option) any later version.
+**
+**  This library is distributed in the hope that it will be useful,
+**  but WITHOUT ANY WARRANTY; without even the implied warranty of
+**  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+**  GNU Lesser General Public License for more details.
+**
+**  You should have received a copy of the GNU Lesser General Public License
+**  along with this library.  If not, see <http://www.gnu.org/licenses/>.
+**
+*******************************************************************************/
+
+#pragma once
+
+
+#ifndef QLEDMATRIX_EXPORT
+# ifdef BUILD_STATIC_LIBRARIES
+#  define QLEDMATRIX_EXPORT
+# else
+#  ifdef MAKE_QLEDMATRIX_LIB
+#   define QLEDMATRIX_EXPORT Q_DECL_EXPORT
+#  else
+#   define QLEDMATRIX_EXPORT Q_DECL_IMPORT
+#  endif
+# endif
+#endif
+
+#include <QWidget>
+
+class QLedMatrixPrivate;
+class QLEDMATRIX_EXPORT QLedMatrix : public QWidget
+{
+  Q_OBJECT
+  Q_PROPERTY(QColor     backgroundColor READ backgroundColor WRITE setBackgroundColor)
+  Q_PROPERTY(Qt::BGMode backgroundMode  READ backgroundMode  WRITE setBackgroundMode)
+  Q_PROPERTY(QColor     darkLedColor    READ darkLedColor    WRITE setDarkLedColor)
+  Q_PROPERTY(int        rows            READ rowCount        WRITE setRowCount)
+  Q_PROPERTY(int        columns         READ columnCount     WRITE setColumnCount)
+
+public:
+  QLedMatrix(QWidget* parent = nullptr);
+  virtual ~QLedMatrix();
+
+  enum LEDColor
+  {
+    NoColor   = 0xFF222222,
+
+    Red       = 0xFFFF0000,
+    Green     = 0xFF00FF00,
+    Blue      = 0xFF0000FF,
+
+    White     = 0xFFFFFFFF,
+    Orange    = 0xFFFF8800,
+    OrangeRed = 0xFFFF2200,
+    Yellow    = 0xFFFFFF00
+  };
+  Q_ENUM(LEDColor)
+
+  void clear();
+
+  QColor backgroundColor() const;
+  void   setBackgroundColor(const QColor& color);
+
+  Qt::BGMode backgroundMode() const;
+  void setBackgroundMode(Qt::BGMode mode);
+
+  QColor darkLedColor() const;
+  void   setDarkLedColor(const QColor& color);
+
+  QRgb colorAt(int row, int col) const;
+  void setColorAt(int row, int col, QRgb rgb);
+
+  int  rowCount() const;
+  void setRowCount(int rows);
+
+  int  columnCount() const;
+  void setColumnCount(int columns);
+
+  inline void setSize(const QSize &s) { setRowCount(s.height()); setColumnCount(s.width()); }
+
+  QSize sizeHint() const;
+
+protected:
+  QLedMatrixPrivate* const d_ptr;
+  void paintEvent(QPaintEvent*);
+
+private:
+  Q_DISABLE_COPY(QLedMatrix)
+  Q_DECLARE_PRIVATE(QLedMatrix)
+};
+