Currently, worlds can be loaded, but they are not saved.

Resolving this issue will require periodic saving of chunk data, entities, level data, and player data to world saves.

Notes:

• hematite-nbt does not support serializing NBT long arrays, which is required for writing chunk data (see Papercut: nbt-serde always writes List tags as opposed to ByteArray/IntArray tags PistonDevelopers/hematite_nbt#27). A PR will have to be submitted to them to fix this.