Respect cancelled drops

[masmc05]

Currently if other plugins cancel block drops, some drop will still happen due to the fact that an ability is doubling the drop. This pr fixes that and if other plugins cancel the drops then AuraSkills will not try to drop anything

[Archy-X]

This could cause issues with plugins that directly add drops to the player's inventory, which would prevent AuraSkills from doing the same with extra drops. I'm cautious to merge this until this behavior is confirmed to be preserved.

[masmc05]

Plugins that does that should use https://jd.papermc.io/paper/1.21.1/org/bukkit/event/block/BlockDropItemEvent.html#getItems() instead of this event

Even AuraSkills is misusing the break event to add some drops, as this should have been a separate event with a proper method