QmlDesigner: QmlPuppet as standalone tool

The qmlpuppet is now a standalone tool. There is new a library too with
the communication code. That is shared between the designer and the
puppet. It's in a .cmake file so it can be included by the standalone
tool if it is not part of a designer build.

Task-number: QDS-5879
Change-Id: I2bc2a0b463fbb3e0c8c23d182abfd368cf87e968
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>

src/libs/qmlpuppetcommunication/commands/endpuppetcommand.h

@@ -0,0 +1,23 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0 WITH Qt-GPL-exception-1.0
+
+#pragma once
+
+#include <qmetatype.h>
+
+namespace QmlDesigner {
+
+class EndPuppetCommand
+{
+public:
+    EndPuppetCommand();
+};
+
+QDataStream &operator<<(QDataStream &out, const EndPuppetCommand &command);
+QDataStream &operator>>(QDataStream &in, EndPuppetCommand &command);
+
+QDebug operator <<(QDebug debug, const EndPuppetCommand &command);
+
+} // namespace QmlDesigner
+
+Q_DECLARE_METATYPE(QmlDesigner::EndPuppetCommand)