Adventure 4.15

[Machine-Maker]

- [x] removeResourcePacks(UUID, UUID...)
- [x] clearResourcePacks
- [x] sendResourcePacks(ResourcePackRequest)
- [x] request callbacks
- [x] Translator#hasAnyTranslations (improve perf for rendering translatables)
- [ ] mark other send methods on Player as Obsolete/Deprecated?
- [x] bundle packet
- [x] ~~options for default serializers~~not required, old way still works
- [x] TranslationArgument migration

[Machine-Maker]

So we need to decide what happens if someone registers a callback for a UUID that already has one registered, and when exactly those callbacks are fired.

[kennytv]

I dont think the others need marking, they stand fine as convenience methods for now. The callbacks should be called before bukkit events. For the same registered UUID, just override

[Machine-Maker]

Ok, removed all the TODO comments added and left comments explaining those decisions. Should be all ready.