Render individual legal moves with green highlights when zoomed out #796
Description
When you select a long range piece, if there is a single or a few movable to square(s), (such as when you are being checked from massive distances, and you zoom out, you should clearly see this/these square(s) in green, so that you can quickly go to them, instead of relying on ray drawing to find the only squares you can move to.
Perhaps only render them if you are in check, as otherwise it's pretty clear and easy to know where you can move.
This can be done in miniimages.ts by rendering additional square highlights on the selected piece's legal individual moves.