Make the seam visible

[3dbybrunolopes]

Hi,

We need more development on this!
1. We need to be able to see it in preview!
2. We need other features for positioning it, ideally be able to paint where we would like to be created, and the slicer doing the rest.

[3dbybrunolopes]

Seam painting/placement logic

[gwhite]

I'm very surprised there isn't more interest in this. I use seam painting all the time is Prusa & Orca slicers.