Added EzPickle to the environments

[BolunDai0216]

Description

All of the environments now also inherit from gymnasium.utils.EzPickle. Included a test for pickling.

Type of change

New feature (non-breaking change which adds functionality)

Checklist:

• I have run the pre-commit checks with pre-commit run --all-files (see CONTRIBUTING.md instructions to set it up)
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[pseudo-rnd-thoughts]

Looks good, could you add a test that for each environment, you try to pickle and unpickle the object.
This is an example from Gymnasium. https://github.com/Farama-Foundation/Gymnasium/blob/33e32178ffdf040a095bd2c856f6410bc7ec1306/tests/envs/test_envs.py#L197

An interesting addition, in comparison to the gymnasium is to pass a keyword to check that works

[BolunDai0216]

Looks good, could you add a test that for each environment, you try to pickle and unpickle the object. This is an example from Gymnasium. https://github.com/Farama-Foundation/Gymnasium/blob/33e32178ffdf040a095bd2c856f6410bc7ec1306/tests/envs/test_envs.py#L197

An interesting addition, in comparison to the gymnasium is to pass a keyword to check that works

I added the test and passed a keyword using gym.make(env_id, max_episode_steps=100).unwrapped, is that what you had in mind?