Add qmlImportPaths property to .pyproject file

Users should be able to add custom QML import paths for
Python/PySide2/PyQt5 projects in Qt Creator in order to
get syntax highlighting and code completion for custom
QML modules.

Fixes: QTCREATORBUG-23679
Change-Id: Iec7c691c4b8709c48a790cd27ac7c6e755967796
Reviewed-by: hjk <hjk@qt.io>

tests/manual/python/pyproject/main.py

@@ -0,0 +1,58 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+#############################################################################
+##
+## Copyright (C) 2020 The Qt Company Ltd.
+## Contact: https://www.qt.io/licensing/
+##
+## This file is part of Qt for Python.
+##
+## $QT_BEGIN_LICENSE:LGPL$
+## Commercial License Usage
+## Licensees holding valid commercial Qt licenses may use this file in
+## accordance with the commercial license agreement provided with the
+## Software or, alternatively, in accordance with the terms contained in
+## a written agreement between you and The Qt Company. For licensing terms
+## and conditions see https://www.qt.io/terms-conditions. For further
+## information use the contact form at https://www.qt.io/contact-us.
+##
+## GNU Lesser General Public License Usage
+## Alternatively, this file may be used under the terms of the GNU Lesser
+## General Public License version 3 as published by the Free Software
+## Foundation and appearing in the file LICENSE.LGPL3 included in the
+## packaging of this file. Please review the following information to
+## ensure the GNU Lesser General Public License version 3 requirements
+## will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+##
+## GNU General Public License Usage
+## Alternatively, this file may be used under the terms of the GNU
+## General Public License version 2.0 or (at your option) the GNU General
+## Public license version 3 or any later version approved by the KDE Free
+## Qt Foundation. The licenses are as published by the Free Software
+## Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+## included in the packaging of this file. Please review the following
+## information to ensure the GNU General Public License requirements will
+## be met: https://www.gnu.org/licenses/gpl-2.0.html and
+## https://www.gnu.org/licenses/gpl-3.0.html.
+##
+## $QT_END_LICENSE$
+##
+#############################################################################
+
+import os
+import sys
+
+from PySide2.QtGui import QGuiApplication
+from PySide2.QtQml import QQmlApplicationEngine
+
+
+if __name__ == "__main__":
+    app = QGuiApplication(sys.argv)
+
+    engine = QQmlApplicationEngine()
+    engine.load(os.path.join(os.path.dirname(__file__), "main.qml"))
+
+    if not engine.rootObjects():
+        sys.exit(-1)
+
+    sys.exit(app.exec_())