feat: add PlayerBundleItemSelectEvent

[mrtz6]

Adds a new event that is called when a player selects an item in a bundle.

[mrtz6]

This pretty much enables listening for scrolling above an item. Here are some usage examples for this event:

rules.mp4

item_browser.mp4

[Owen1212055]

I think it may be better to view this as an inventory event? As then you can instead act on a slot in an inventory so this can be better used in inventory guis.

Also, exposing the previous selected slot would be nice.

[mrtz6]

Inventory event does make more sense as the supertype for this event: PlayerBundleItemSelectEvent now inherits InventoryEvent. Added slot and previous index/item fields.

[Owen1212055]

Can this also be made cancellable Also, move most of this logic to craft event factory.

[mrtz6]

I now moved all of the firing logic to the craft event factory; not sure how the logic could have been split up.

[mrtz6]

I was thinking: would it maybe be a good addition for the event to expose a getSelectionDelta / getScrollDirection method to simplify the GUI scrolling handling? I'm guessing this event will mainly be used for GUI-related stuff anyway.