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Reworked core chunk spawning system ----------------------------------- The new system now coordinates chunk spawns to improve performance, ensuring only a single chunk is spawned at a time. Chunk spawning is now better spread across multiple ticks to improve performance, with the rate at which they are spawned controlled by a new chunk layer spawn rate configuration option - which specifies the number of y layers of a chunk to spawn each tick, up to 512. The default is 8, and it may be sensible to lower this if chunk spawning is causing performance issues. This rework is a breaking change for existing worlds, but should be safe to update as long as the world is not in the process of spawning a chunk when the update is applied. Features -------- * The World Mender will now spawn chunk by applying the type of chunk spawner provided to it - including unstable chunk spawners and biome themed chunk spawners. * The rate at which the World Mender spawns chunk is now configurable, defaulting to as fast as possible. It will not spawn chunks while a chunk spawn is in progress. * Added a new Generate Line World option. If enabled, the world will spawn all chunks along a line from spawn. Using this setting will disable settings that select a spawn point. * The biome for unspawned chunks can now be set as part of sky dimension data packs. * A covering block (e.g. snow) can now be set as part of sky dimension data packs. * The number of initial chunks can now be configured up to 100. * Tweaked recipe unlocks and advancement order. Bug Fixes --------- * Fixed a crash when entities are spawned as part of a chunk spawn in the nether. * Fixed unreliability in the spawning of villagers and other entities when spawning a chunk. * Spawning chunks now replace snow in the original chunk.