[feature] new optomizations

[Thunderrock424242]

Cache: Shares recent paths (1s TTL) for mobs starting from the same spot toward the same target.

Distance‐skip: Skips all nav logic when >256 blocks from player.

[DarkGuardsman]

Not sure mojang's pathing engine would allow for caching in that way. We have considered doing chunk by chunk path caching. As there are other mods that have shown it to work.

Distance skipping should be easy enough to implement when I find time. As I can see the argo AI logic to clear the target if beyond a set range.