Revision control

++ # Copyright (C) 2022 The Qt Company Ltd.
++ # SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
++
++ qt_internal_add_example(1_readonly)
++ qt_internal_add_example(2_formatting)
++ qt_internal_add_example(3_changingmodel)
++ qt_internal_add_example(4_headers)
++ qt_internal_add_example(5_edit)
++ qt_internal_add_example(6_treeview)
++ qt_internal_add_example(7_selections)