Craftax

- Offline dataset released
- Bug for ascending ladders introduced in v1.1.2 has been fixed
- Wrappers moved to the baselines repo

- Refactor environments and wrappers. People had been running into errors with the confusion provided by the auto-reset behaviour. The environments and wrappers have now been refactored to make it very explicit which one is being used. A downside of this is that there are now 8 different environments (classic?, symbolic?, autoreset?).
- Fix play script bugs
- Fix pixel res
- Fix bug in optimistic reset wrapper (not critical)
- Added an option to force spawning of a diamond in the overworld (by default in Craftax-Classic ~35% of worlds have no diamond)

Replaced parent `src` folder with `craftax` and correctly pointed `pyproject.toml` so that `pip install` now performs correctly.
Unfortunately this is a breaking change as all imports now require a `craftax.` prefix.