Add pause option to play to allow turn based games

[foreverska]

Description

Added new option to play which requires the user to provide an input to move the environment forward. Defaults to False to not break existing implementations.

Fixes #802

Type of change

Please delete options that are not relevant.

• 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]

Thanks, this is a very helpful PR.
Could we have a better argument name than pause, for example,wait_for_user? Also could you add an sentence to the main part of the docstring saying for turn-based environments, then enable X
Otherwise, should be good to merge

[foreverska]

Thanks for the quick reply and the kind words. I have made the proposed changes.

[pseudo-rnd-thoughts]

Thanks for the changes