[Commands] Cleanup #npcedit Command. (#2582)

* [Commands] Cleanup #npcedit Command.

- Make use of repositories and cleanup logic.

* Remove accidental change.

zone/command.h

@@ -31,6 +31,7 @@ uint8 GetCommandStatus(Client *c, std::string command_name);
 void ListModifyNPCStatMap(Client *c);
 std::map<std::string, std::string> GetModifyNPCStatMap();
 std::string GetModifyNPCStatDescription(std::string stat);
+void SendNPCEditSubCommands(Client *c);
 
 // Commands
 void command_acceptrules(Client *c, const Seperator *sep);