Concurrent Chunk Management Engine (Fabric)

C2ME 0.3.5.0 for Minecraft 1.21.10 is released

Mostly bugfixes.

Changelog:

• refactor: migrate more internals to RxJava
• perf: avoid primitive boxing in gcFreeChunkSerializer
• change: enable notickvd always
• build: bump ci to Ubuntu 24.04, Java 25, LLVM 20.1.8
• fix: futures returned by the API get desynced when the target status is raised then lowered in quick succession