added has-item this means if the player has the given item, the command will execute. if you type "/npc has-item", it will disable the function.
fixed few responses, and commands.
NPC name update first /npc create name, without space then /npc rename word-1 word-2, the commands are 1 to unlimit. cause of this is renaming it will add a space at the end, meanwhile commands dont mind the space at the end.