Document hybrid UI approaches more prominently

As a user, I'd like to have some guidance on how to integrate Qt Widgets and Qt Quick, reaping the benefits of both stacks. This 'hybrid UI' approach is however currently not documented in overview pages.

Let's first collect all overview pages that are concerned with Qt Quick and Qt Widget comparison, e.g.

• https://doc.qt.io/qt-6/solutions-for-ui-design.html
• https://doc.qt.io/qt-6/topics-ui.html

Both show Qt Quick and Qt Widgets as more or less exclusive stacks. However, we have various ways to integrate these, as documented in

• https://doc.qt.io/qt-6/qtquick-embeddedinwidgets-example.html
• https://doc.qt.io/qt-6/qquickwidget.html

These approaches should be featured more prominently, possibly in a new overview page?