Fly's Adrenaline

Reworked early world entry handling to avoid a fragile redirect in Minecraft's spawn preparation code, improving compatibility with mods that transform the same method.

Serialized structure cache access during parallel feature generation and cancelled queued world generation jobs during shutdown, preventing cache corruption, lighting failures, and cascading shutdown errors.

Replaced the terrain fill overwrite with a cancellable injection so Adrenaline can coexist with SwiftGen and other mods that modify vanilla noise generation, while retaining Adrenaline's optimized terrain fill path.