Added NWNX_Item_MoveTo()

[Cjreek]

Moves items from anywhere (including the ground) into the inventory of any placeable, creature, store or container.
Moving an item from a container into the inventory containing the container and the other way around won't trigger any feedback messages about having lost/acquired an item.
There's also a general option to disable feedback messages for acquiring/losing items during that function.

/// @brief Move oItem to oTarget
/// @remark Moving items from a container to the inventory of the container's owner (or the other way around) is always "silent" and won't trigger feedback messages
/// @param oItem The item object.
/// @param oTarget The target bag/creature/placeable or store object to move oItem to.
/// @param bHideAllFeedback Hides all feedback messages generated by losing/acquiring items
/// @return TRUE if the item was successfully moved to the target, otherwise FALSE
int NWNX_Item_MoveTo(object oItem, object oTarget, int bHideAllFeedback = FALSE);

closing #1453