Add InventoryMovedItemEvent

[snowpegeon]

Is your feature request related to a problem?

Currently, only InventoryMoveItemEvent can detect when an item in Hopper moves.
In that event, it was previously answered in this issue that it is not possible to manipulate the number of items in paper.
#10434

Currently, in Spigot, it is possible to manipulate the number of items in the hopper and connected inventory using this event.

When Hopper operates, the act of manipulating an item is a very important event for the Storage plugin.
By doing so, it is possible to further increase the ways to play RedStone in-game, such as automatic item production equipment.

On the server I manage, White Carpet alone handles 20 billion items.
I created a storage plugin called StorageSign to manage those items.
If it's true, I would like to use paper on the 55 servers I manage to save weight, but due to this I can't use it and I'm having a lot of trouble.

Describe the solution you'd like.

After the item is moved out of the HopperInventory.
I want an event that can manipulate Items in the Inventory connected to Hopper.

Describe alternatives you've considered.

Like Spigot, you can manipulate the number of items using InventoryMoveItemEvent.

Other

A similar feature request has been submitted before, but it has been closed without any action being taken.
#10493

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