* Fix Gradle deprecations
By using test suites, we explicitely configure the relevant dependencies
on the test sourceset. This is not done by merely configuring the test task.
* Switch to maintained version of Shadow
* Update to Gradle 8.14.2
This technically can break backwards compatibility, but this seems to be very unlikely to be the practice in reality. (The Velocity implementation probably wasn't correct, anyway.)
* Update Adventure to 4.16.0
Also migrated shadow from `com.github.johnrengelman.shadow` to `io.github.goooler.shadow`, which fixes the project compilation using Java 21 and Gradle 8.6
* Update Gradle to 8.6 release
* Do not apply a resource pack that has already been applied
* Throw IllegalStateException in case of applying a resource pack already applied from the API
* Updated some dependencies
* Added support for ServerResourcePackSendEvent resource pack modification
The API changes required for adopting resource packs are still needed, however
the maven snapshots repo is dead, and nothing technically stops us from doing
this
Fixes#1047. We can't go any higher since that's an API-breaking change. In any event, this will likely disappear in 5.0.0 anyway, because Configurate 4.x now shades SnakeYAML internally.
