Fix chunk loading

[kralverde]

Description

This PR fixes the "but no one was watching spam", removes the need to wait for chunks when removing a player and removes the concept of pending tasks from the player, adds perma-loaded spawn chunks, drastically speeds up loading screen time when joining, and leverages rayon rather than async to stream chunks.

Testing

Joined a world

Checklist

Things need to be done before this Pull Request can be merged.

• Code is well-formatted and adheres to project style guidelines: cargo fmt
• Code does not produce any clippy warnings: cargo clippy
• All unit tests pass: cargo test

[OfficialKris]

Works great. There seems to be a memory leak somewhere because I got up to 700MB ram usage after roaming around at 32 chunks then going back to spawn and turning the setting back to 10. It continued to increase whenever generating chunks and didn't go down. Current master maxes at ~300MB then immediately drops to 51MB after not generating chunks. This was with release build.

[kralverde]

Works great. There seems to be a memory leak somewhere because I got up to 700MB ram usage after roaming around at 32 chunks then going back to spawn and turning the setting back to 10. It continued to increase whenever generating chunks and didn't go down. Current master maxes at ~300MB then immediately drops to 51MB after not generating chunks. This was with release build.

I'm unable to reproduce. Are you sure it's a memory leak and not rust just allocating memory for the internal map?

[kralverde]

@OfficialKris can you check your benchmarks again? I'm curious how this latest commit affects it. I'm getting ~100M of memory usage.

[Snowiiii]

Just tested and it works pretty nice. Finally pumpkin is usable in debug builds :D.
Thanks @kralverde