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/Plugins/plugins/parent_alpha/parent_alpha.h

@@ -0,0 +1,35 @@
+#pragma once
+
+#include "../../interfaces/parent_interface.h"
+#include <QLineEdit>
+#include <QObject>
+#include <QVBoxLayout>
+
+namespace DLBO
+{
+class ParentAlpha
+    : public QObject
+    , public ParentInterface
+{
+  Q_OBJECT
+  Q_PLUGIN_METADATA(IID "gui:3:ParentInterface")
+  Q_INTERFACES(ParentInterface)
+
+  public:
+  ParentAlpha();
+  QString pluginName() const override { return QStringLiteral("AlphaParent"); }
+  QWidget *widget() override { return m_widget; }
+  void addChildWidget(QWidget *childWidget) override;
+  QObject *qobjectInstance() override { return this; }
+
+  signals:
+  void dataChangedLive(const QString &text);
+
+  private:
+  QWidget *m_widget;
+  QVBoxLayout *m_layout;
+  QLineEdit *m_inputField;
+};
+
+}
+