message: Add docs for NWNX_ON_VALIDATE_USE_ITEM
diff: @@ -54,7 +54,11 @@ _______________________________________
  ITEM_OBJECT_ID | object | Convert to object with StringToObject()|
  BEFORE_RESULT | int | TRUE/FALSE, only in _AFTER events|
  - @note Setting the result to "0" will cause the item to appear unusable (red) in the inventory.
  + @note The event result should be one of:
  + "0" - Equip denied
  + "1" - Equip okay
  + "2" - Swap currently equipped item
  + "3" - Unequip items in both hands before equipping
  @note Setting the result of this event will NOT prevent the item from being equipped, only used (e.g. scrolls/wands). See the "NWNX_ON_VALIDATE_ITEM_EQUIP_*" events to control equip behaviour.
  @note If the BEFORE event is not skipped, BEFORE_RESULT is the value of running the function normally. Otherwise, this is the set result value.
  