Update SB3 tutorial (action masking, tests)

[elliottower]

Description

This PR does the following:

• Fix minor issue for macOS (not having __main__)
• Enabling CI tutorial tests
• Adding a new tutorial for action masking, and a small file to test that it works with all PettingZoo AEC envs
• Fixing all usages of RLLib to be the correct stylization, RLlib

Fixes # (issue), Depends on # (pull request)

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Screenshots

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Checklist:

• I have run the pre-commit checks with pre-commit run --all-files (see CONTRIBUTING.md instructions to set it up)
• I have run pytest -v and no errors are present.
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I solved any possible warnings that pytest -v has generated that are related to my code to the best of my knowledge.
• 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

[elliottower]

No idea why I'm getting this error in the CI, thinking maybe it's cause the env takes too long to run? But others could do multiple iterations fine. Maybe it's to do with pistonball specifically somehow? The others run fine it seems. Running it locally it takes a minute to run, whereas the other envs can finish in a second.

Using cpu device
Wrapping the env in a VecTransposeImage.
------------------------------
| time/              |       |
|    fps             | 877   |
|    iterations      | 1     |
|    time_elapsed    | 46    |
|    total_timesteps | 40960 |
------------------------------
XIO:  fatal IO error 0 (Success) on X server ":99"
      after 84 requests (84 known processed) with 0 events remaining.
Model has been saved.
XIO:  fatal IO error 0 (Success) on X server ":99"
      after 84 requests (84 known processed) with 0 events remaining.
Error: Process completed with exit code 1.