fix: issues with dropping items

[Boy0000]

There really is no perfect way to handle it
InventoryClickEvent lets us handle most things when dropped from the Inventory screen
Items dropped from hand are not possiible really to get
the issue is that the PlayerDropItemEvent fires after the player has dropped the item
Thus the GearyInventory#find returns -1 when attempting to index for the itemstack
It is also flawed as if you drop a single item, the itemstack would not be found in the inventory anyway

The best one can do is handle it via the itemDrop entity as a geary-entity though i doubt thats the idea

@EventHandler(ignoreCancelled = true)
fun PlayerDropItemEvent.emitOnItemDrop() {
    itemDrop.toGearyOrNull()?.emit<OnItemDrop>()
}

[0ffz]

Closing as we decided to create a temporary item entity from the dropped item instead.