qmlcachegen/qmlsc: Warn if an Item in a Layout specifies `width` instead of `Layout.preferredWidth`

This code contains a simple mistake that is not obvious to many:

import QtQuick
import QtQuick.Layouts

Window {
    width: 640
    height: 480
    visible: true

    ColumnLayout {
        width: 50
        height: 50

        Image {
            width: 50
            height: 50
            sourceSize.width: 100
            sourceSize.height: 100
            source: "circle.svg"
        }
    }
}

The resulting image will be 100x100, even though the layout's width and height are equal to the Image's specified width and height.

It would be good for tooling to point out that width/height are ignored, and suggest using Layout.preferredWidth/Layout.preferredHeight instead.

Update

qmllint does provide this warning, but it needs to be manually run as it is currently not integrated with Qt Creator or qmlcachegen/qmlsc. It would be helpful for users to get these warnings at edit-time and/or compile-time.