Some typing improvements, add py.typed

[micimize]

Description

• Improves some method typing for the MinigridEnv api and elsewhere.
• Adds a py.typed marker so that tooling like mypy will know to use minigrid's type annotations.
• Changed name in setup.py to minigrid

I did not find a CONTRIBUTING.md but did pre-commit and ensured all tests pass.

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
• 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 for the PR, this is very helpful.
Could you fix the pre-commit issues

Also, I believe minigrid is python 3.7+ so we can add from __future__ import annotations for improved annotations. The pre-commit pyupgrade should do most of the hard work so just add the import and run pre-commit.

Do you use minigrid a lot? Would you be interested in helping with adding more features? If so, could you join the farama foundation discord (https://discord.gg/bnJ6kubTg6) and message me, PseudoRnd

[micimize]

@pseudo-rnd-thoughts ok – I've added an --add-import to isort along with autoflake to remove the leftover imports, and changed the ordering to reduce the need for re-running pre-commit (pyupgrade removes need for imports, removing imports effects isort ordering)

I have only really just started using it for my project – some details here: #168 (comment). But would be happy to join the discord – can you resend an invite? It became invalid when discord tried to make me a new account :/

[pseudo-rnd-thoughts]

Thanks for the changes, here is a new link https://discord.gg/N8CwYyGt
Could you revert the setup name then we can merge