Add list of chunks checked for nagastone

[Gordon-Frohman]

To avoid checking one chunk more than once

[TimeConqueror]

The provided solution will impact both performance and ram while adding new chunks without clearing them. Moreover it will try to scan chunk, which was scanned before game relaunching. Also the block "check" is not worth being stored in these chunks, thus polluting it

[Gordon-Frohman]

Moreover it will try to scan chunk, which was scanned before game relaunching

You mean, like, chunk that was scanned during the previous session? I'm adding a boolean to NBT to keep track of that