Move the whole world state to prismarine-world for better packaging

[rom1504]

This will make blockAt async and break everything depending on it.
But it's for the good cause of being able to implement a world representation with any kind of backend (especially async backend like databases)

https://github.com/PrismarineJS/prismarine-world

https://github.com/andrewrk/mineflayer/blob/master/lib/plugins/blocks.js

[rom1504]

One way to make the transition smoother is to just deprecate blockAt, implement it using prismarine-world-sync and use bot.world for everything else.

[rom1504]

Something interesting about this is a prismarine-world-blockfinder could be made and used in mineflayer-blockfinder that would then be just a few lines.

[rom1504]

requires PrismarineJS/prismarine-chunk#16 (comment)

[rom1504]

(using prismarine-world-sync would break mineflayer in the browser though, maybe it should be an optional dependency and we'd have no blockAt function for the no-prismarine-world-sync case, or maybe we could just remove blockAt altogether, but that would mean doing PRs on all projects using mineflayer)

[rom1504]

Related idea : have a prismarine-world-snapshot that would take a snapshot of a given region and allow a sync api on that region. That might be useful to speed up blockfinder.
(or maybe doing it asyncly would be fast enough, better benchmark before doing that)

[rom1504]

Alright, let's start with using prismarine-chunk in mineflayer. That will give us cross platform chunk (PrismarineJS/prismarine-chunk#19) + we don't have to deal with the async problem for now.