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.h

@@ -0,0 +1,24 @@
+#pragma once
+
+#include "Core/core.hpp"
+#include <QWidget>
+
+namespace Ui {
+class CustomWidget;
+}
+
+class CustomWidget : public QWidget
+{
+  Q_OBJECT
+
+public:
+  explicit CustomWidget(QWidget *parent = nullptr);
+  ~CustomWidget();
+  void onPositionChanged(const Core::GeoPosition &position, int participantId);
+
+signals:
+  void finOnMapClicked();
+private:
+  Ui::CustomWidget *m_ui;
+};
+