Item stack clicking interaction events

[BoogieMonster1O1]

This adds two interaction events that fire before ItemStack#onClicked and ItemStack#onStackClicked. Both are cancellable.

here's the testmod (a miniature fluid api 😄) - https://i.imgur.com/2APkSj3.mp4

[oliviathevampire]

Seems like you have some unused imports which makes the checks fail

[Prospector]

The API looks fine to me, my only suggestion would be to maybe simplify the test mod? It seems a bit complicated and is nearly half of the PR. It's also not entirely clear to me from your video how it is supposed to be working. Perhaps some more obvious and simplified tests would be better, and more helpful to future maintainers of this code.

[maityyy]

Any updates?

[kanpov]

Any updates?

another abandoned fabric pr in the bag