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/Common/LtsWidgets/lts_splitter_handle.cpp

@@ -0,0 +1,92 @@
+/**
+* @RDE_HEADER@
+* Splitter with sizes Proberty for Animation
+* $Id$
+* $HeadURL$
+* $Author kemayou_s$
+*/
+
+#include "lts_splitter_handle.h"
+#include <QPainter>
+#include <QPaintEvent>
+#include <QBrush>
+#include <QEvent>
+#include <QLinearGradient>
+#include <QDebug>
+
+
+namespace LtsWidgets
+{
+
+LtsSplitterHandle::LtsSplitterHandle(Qt::Orientation orientation, QSplitter *parent)
+  : QSplitterHandle(orientation, parent)
+{
+  auto bgrole = backgroundRole();
+  QPalette p = palette();
+  m_endColor = p.color(bgrole);
+
+  m_colorAnimation = new QPropertyAnimation(this, "splittercolor");
+  m_colorAnimation->setDuration(1000);
+  m_colorAnimation->setStartValue(m_currentColor);
+  m_colorAnimation->setEndValue(m_endColor);
+  m_colorAnimation->setLoopCount(2);
+  connect(m_colorAnimation, &QPropertyAnimation::finished, this, [this]{
+    m_animate = false;
+    m_currentColor = m_endColor;
+    repaint();
+  });
+
+}
+
+LtsSplitterHandle::~LtsSplitterHandle()
+{
+}
+
+void LtsSplitterHandle::paintEvent(QPaintEvent *event)
+{
+  if(!m_animate)
+  {
+    QSplitterHandle::paintEvent(event);
+    return;
+  }
+  QPainter painter(this);
+  QLinearGradient gradient;
+  gradient.setColorAt(0, m_currentColor);
+  //gradient.setColorAt(1, m_endColor);
+
+  if(orientation() == Qt::Horizontal)
+  {
+    gradient.setStart(rect().left(), rect().height()/2);
+    gradient.setFinalStop(rect().height(), rect().height()/2);
+  }else
+  {
+    gradient.setStart(rect().width()/2, rect().top());
+    gradient.setFinalStop(rect().width()/2, rect().bottom()/2);
+  }
+  painter.fillRect(event->rect(), QBrush(gradient));
+}
+
+void LtsSplitterHandle::animate()
+{
+  if (m_colorAnimation->state() == QPropertyAnimation::Running)
+    return;
+
+  m_currentColor = QColor(239,87,50);
+  m_animate = true;
+  m_colorAnimation->start();
+}
+
+QColor LtsSplitterHandle::splitterColor() const
+{
+  return m_currentColor;
+}
+
+void LtsSplitterHandle::setCurrentColor(const QColor &currentcolor)
+{
+  if (currentcolor == m_currentColor)
+    return;
+  m_currentColor = currentcolor;
+  repaint();
+}
+
+} // namespace LtsWidgets