[Suggestion] Catwalk Dead-End
Currently, there are four options for catwalk platforms: no walls, one wall, two parallel walls, and two perpendicular walls.
However, there is no current manner in which to create a proper dead-end catwalk. A catwalk with three walls, having one end open, would be useful as an observation point. This could be used for large shipyard overlooks, ship bridges, cliff-side retreats, and more.
As it could be put into the catwalk scroll group, a dead-end catwalk would not litter the block menu.