feat(sim): add metaworld env (#2088)

* add metaworld

* smol update

Signed-off-by: Jade Choghari <chogharijade@gmail.com>

* update design

* Update src/lerobot/envs/metaworld.py

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Signed-off-by: Jade Choghari <chogharijade@gmail.com>

* update

* small changes

* iterate on review

* small fix

* small fix

* add docs

* update doc

* add better gif

* smol doc fix

* updage gymnasium

* add note

* depreciate gym-xarm

* more changes

* update doc

* comply with mypy

* more fixes

* update readme

* precommit

* update pusht

* add pusht instead

* changes

* style

* add changes

* update

* revert

* update v2

* chore(envs): move metaworld config to its own file + remove comments + simplify _format_raw_obs (#2200)

* update final changes

---------

Signed-off-by: Jade Choghari <chogharijade@gmail.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Steven Palma <imstevenpmwork@ieee.org>

CONTRIBUTING.md

@@ -72,7 +72,6 @@ post it.
 
 Look at our implementations for [datasets](./src/lerobot/datasets/), [policies](./src/lerobot/policies/),
 environments ([aloha](https://github.com/huggingface/gym-aloha),
-[xarm](https://github.com/huggingface/gym-xarm),
 [pusht](https://github.com/huggingface/gym-pusht))
 and follow the same api design.