Fixes #6768
Created by: clusterfack
Nuclear disk no longer wallows in the GC, it GC's properly now when a pinpointer is pointed towards it. Also, it can respawn on destroy() as well as del() so that it doesn't NEED TO be deleted to respawn.
Did some other things:
- Nuclear disk now uses the object process scheduler instead of its own hacked together system of spawn() call itself (which in theory could create multiple threads doing the same thing if you spammed it)
- It is now more obvious that the pinpointer can tell you if the nuke is ticking or not, a functionality it always had but nobody knew about