Fix copy command to store information better

[Ghoulboy78]

Cos right now it's not particularly efficient. I think I'lll store in a similar way to structure files etc.

• Make copy with no pos just copy from the northwest corner
• Change saving system
• Change code in structure() to be more compact once previous is completed.

[Firigion]

You mean the clipboard to disc or the virtual clipboard?

[altrisi]

Tbh I'd just store it directly as a structure file but in memory, and make the structure save command just write it to a file, making it simpler to save any of the two (a selection/an already existing clipboard, since saving current selection would basically call "make" a clipboard then save).

That would also make it simpler to at some point save the clipboards when closing/restarting/leaving the server, just write_file and that's it.