Entity Events module

[williambl]

This PR adds:

• A new library, entity (as described in RFC #9)
• A new module, entity_events
• A set of events in that module.
• A test mod for that module.

The events included are:

• EntityKilledCallback, with similar purpose to Fabric's AfterKilledOtherEntity.
• TryReviveCallback - the AllowDeathEvent I wrote for FAPI was merged in a state I was unhappy with. This is closer to how I imagined it.
• EntityWorldChangedEvents - unchanged from FAPI's ServerEntityWorldChangedEvents, other than name.
• EntityLoadEvents, two events for when entities are loaded and unloaded on the server.
• ClientEntityLoadEvents, ditto but for the client.
• ServerPlayerEntityCopyCallback, for copying data after player respawn.

There is certainly space for more events.

[williambl]

marking as ready for review just for hacktoberfest, sorry :(

[BasiqueEvangelist]

Could you add events for copying player data on respawn and travel from end?

[williambl]

Going to rebase onto 1.18 and force push.

[williambl]

Not sure why checks are failing, they're passing locally

[williambl]

@BasiqueEvangelist added ServerPlayerEntityCopyCallback (name subject to change because that's quite long) - does this fit what you'd need?

[BasiqueEvangelist]

@BasiqueEvangelist added ServerPlayerEntityCopyCallback (name subject to change because that's quite long) - does this fit what you'd need?

This seems to fit all common use cases, so yes.

[TheGlitch76]

is this API still WIP?

[williambl]

is this API still WIP?

There are a couple more events to be added, but I think I'd be happy to merge these existing ones as-is. (with the caveat that I'd like someone to have a look at the the tryrevive events and see if they can be done with the event phase system, which I'm having trouble wrapping my head around)

[williambl]

rebasing onto 1.19

[williambl]

unrebasing back onto 1.18, i wasn't thinking straight

[williambl]

Should this be rebased onto 1.19?

[EnnuiL]

Should this be rebased onto 1.19?

I might be a bit biased on that, but yeah, considering that Registry Sync is pretty much almost done, with it hopefully getting on the road of a possible FCP, I think we can begin bumping the remaining PRs to 1.19

[williambl]

rebased onto 1.19. not yet tested on 1.19.

[williambl]

not sure why it auto-requested review from worldgen gui and data teams...

[williambl]

This has now been tested on 1.19.

[williambl]

We're almost there! With the Checkstyle clean-ups, I could spot few potential problems

All addressed I think - maybe this'll get merged before its birthday! :P