[Proposal] Add Pufferlib Vectorisation

[pseudo-rnd-thoughts]

Proposal

Joseph, the creator of PufferLib has offered that we can copy their high-performance vectorisation environment into Gymnasium (https://x.com/jsuarez5341/status/1886878105236595011).

From the initial look, we need to incorporate https://github.com/PufferAI/PufferLib/blob/2.0/pufferlib/vector.py with the documentation https://puffer.ai/docs.html#post-3.

I'm uncertain if we fully replace SyncVectorEnv with their Serial implement and likewise for AsyncVectorEnv and Multiprocessing.

Motivation

Pufferlib's implementation is much better their our Gymnasium implementation.

Pitch

No response

Alternatives

No response

Additional context

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Checklist

• I have checked that there is no similar issue in the repo