Qt Quick Shapes: Loading vector graphics

There's no good story for how to get from a vector-based design to Qt Quick Shapes at the moment. This requires some research, but ideally there would be a way to load graphics from a vector format that editors can output and get this into Qt Quick.

We could perhaps piggy-back on the parser in Qt SVG (or Qt Lottie) and have this output a Qt Quick graph. Qt Quick is quite expressive and should be able to support everything such a format supports.

This graph could then be saved to files for embedding in application (as part of a conversion app) or loaded into memory at runtime and added to the existing graph.