Added PySide6 support

Task-Id: KDDW-27

python/PyKDDockWidgets/__init__.py.cmake

@@ -0,0 +1,24 @@
+#
+# This file is part of KDDockWidgets.
+#
+# SPDX-FileCopyrightText: 2020-2021 Klarälvdalens Datakonsult AB, a KDAB Group company <info@kdab.com>
+# Author: Renato Araujo Oliveira Filho <renato.araujo@kdab.com>
+#
+# SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only
+#
+# Contact KDAB at <info@kdab.com> for commercial licensing options.
+#
+
+import sys
+
+__all__ = ['KDDockWidgets']
+
+# Preload PySide2 libraries to avoid missing libraries while loading KDDockWidgets
+try:
+    from PySide@PYSIDE_MAJOR_VERSION@ import QtCore
+    # Create a alias for PySide module so we can use a single import in source files
+    import PySide@PYSIDE_MAJOR_VERSION@
+    sys.modules["PySide"] = PySide@PYSIDE_MAJOR_VERSION@
+except Exception:
+    print("Failed to load PySide")
+    raise