Create an easier way to start a new world

[Volte6]

Description

There is a mostly-empty world called "empty" currently, which contains a handful of basic files to have a stripped down world to start building in.

We need a better system of spawning a new world... either an in-game command, or a command line argument.

something like:

gomud.exe --new-world="mushroom kingdom"

or

server newworld "mushroom kingdom"

This would ideally do a quick copy or creation of the key files, probably from the "default" provided world, adjust the config as needed and so on.

This will save us from having to update two folders whenever we make changes to helpfiles etc.