Read Index for Repeat On Points not affected by Reverse

[DallinYauney]

Checking the "Reverse" box for the Repeat on Points node doesn't change the order of the indices, like I'd expect.

Demo (performed on PWA of latest web version):

Screencast_20260513_014024.webm

Expected functionality:
The 0 is shown on the right, and the 4 is shown on the left, and similarly the 1 and 3 would be reversed, as though the vertices are being processed from right to left instead of left to right.

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PS. I'm ready to submit a PR that I believe fixes this issue, if that's something you'd be interested in.

[Keavon]

The intention is to reverse the paint order. I would need to think about whether or not the context-fed index order should also be reversed, I'm actually not certain.