Qt6 Migration: Merge latest Qt5 devel content and apply migration fixes

- Merged 292 changed files from dlbo snapshot
- Fixed IDL enum collisions (PortType, PdmEventType)
- Fixed Grantlee template for C++11 scoped enums
- Fixed CMake VERSION_GREATER syntax
- Added missing directories (THP, LtsRestClient, etc.)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Lts/Tools/Examples/TestGuiElement/custom_widget.cpp

@@ -0,0 +1,33 @@
+#include "custom_widget.h"
+#include "LtsCoordTrans/lts_coord_trans.h"
+#include "ui_custom_widget.h"
+#include <QDebug>
+
+CustomWidget::CustomWidget(QWidget *parent)
+  : QWidget(parent)
+  , m_ui(new Ui::CustomWidget)
+{
+  m_ui->setupUi(this);
+
+  connect(m_ui->pbFindOnMap, &QToolButton::clicked, this, &CustomWidget::finOnMapClicked);
+}
+
+CustomWidget::~CustomWidget()
+{
+  delete m_ui;
+}
+
+void CustomWidget::onPositionChanged(const Core::GeoPosition &position, int participantId)
+{
+  if (participantId == 0 || std::isnan(position.lon()) || std::isnan(position.lat()))
+    m_ui->lblPos->setText(tr("Invalid Position"));
+  else
+  {
+    QString mgrs = LtsCoordTrans::mgrsFromGeographic(position.lon(), position.lat());
+
+    if (!qFuzzyIsNull(position.z()))
+      mgrs += QStringLiteral(" | ") + QString::number(position.z(), 'f', 2);
+
+    m_ui->lblPos->setText(mgrs);
+  }
+}