Build Mode Extension

[NotAFile]

Goal

It would be nice to have a mode where players can edit the map in various ways. This is useful for build servers, map editing and new weird building game modes we can't think of yet.

Build mode players would be visible to other players in build mode only. They can fly and edit any location of the map freely as they choose. Ideally, this extension would then provide some kind of bulk map editing operations to make map editing using this mode feasible. Care needs to be given that the server can overrule decisions made by the client if they e.g. don't have permission to build in some area.