Single wall on top surface

[Ibot-11]

Pretty much every PrusaSlicer Fork does have the “Single wall on top surface” option. This only generates one wall on the top surface, resulting in a better surface quality.

This setting is really popular, which a lot of people use to get prettier prints.
Therefore I think it's finally worth adding to the origin all the forks are based on.

Describe how it would work
The same way it works in Bambu Studio, Orcaslicer and Superslicer

Describe alternatives you've considered
Use any of the mentioned forks instead (I currently use Orca because of this)

One wall top surface:

Current top surface:

[rtyr]

Duplicate of #7986