Terminal: External terminal if blocked by modal

Change-Id: I89ba438c7a9f4d593e849b9b7ca2daf202cca625
Reviewed-by: hjk <hjk@qt.io>

src/libs/utils/externalterminalprocessimpl.h

@@ -0,0 +1,29 @@
+// Copyright (C) 2023 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#pragma once
+
+#include "terminalinterface.h"
+
+namespace Utils {
+
+class ProcessStubCreator;
+
+class QTCREATOR_UTILS_EXPORT ExternalTerminalProcessImpl final : public TerminalInterface
+{
+public:
+    ExternalTerminalProcessImpl();
+};
+
+class QTCREATOR_UTILS_EXPORT ProcessStubCreator : public StubCreator
+{
+public:
+    ProcessStubCreator(TerminalInterface *interface);
+    ~ProcessStubCreator() override = default;
+
+    expected_str<qint64> startStubProcess(const ProcessSetupData &setupData) override;
+
+    TerminalInterface *m_interface;
+};
+
+} // namespace Utils