feat(use-svg-overlay): multiple highlight rectangles

[J-Michalek]

This is not in a mergeable state by any means as of now I just wanted to quickly create a proof of concept for this new feature of highlighting multiple elements.

Each step would be able to specify additional elements that will be highlighted by the svg path. I found that sometimes it is useful to highlight more that just one element.

Would love to get your opinion on this new feature!