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/interfaces/child_interface.h

@@ -0,0 +1,25 @@
+#pragma once
+
+#include <QtPlugin>
+#include <QString>
+#include <QWidget>
+
+class ChildInterface
+{
+public:
+    virtual ~ChildInterface() = default;
+    virtual QString childName() const = 0;
+    virtual QString targetParentName() const = 0;
+    virtual QWidget* widget() = 0;
+
+    // Für die einmalige Übergabe direkt nach dem Laden
+    virtual void setParentData(const QString& data) = 0;
+
+    // Für die dynamischen Live-Updates zur Laufzeit
+    virtual void updateLiveData(const QString& text) = 0;
+};
+
+QT_BEGIN_NAMESPACE
+Q_DECLARE_INTERFACE(ChildInterface, "gui:3:ChildInterface")
+QT_END_NAMESPACE
+