Command: keep <item> | [all] | [eq] | [noeq] | [clear]
Arguments:
  <item> is an item you are carrying
  all    adds all items you are carrying to the keep list
  eq     adds all your worn&wielded items to the keep list
  noeq   adds all items that are not worn&wielded to the keep list
  clear  clears the entire keep list

Mofidies your keep list. Items in keep cannot be sold or dropped.
This helps you that you don't accidentally sell or drop your equipment.
  ie. while using sell all/drop all command.

