Fix _action_to_direction usage

[SarvagyaVaish]

Description

To use the _action_to_direction dict, we need to first convert the numerical action (0, 1, 2, 3) to an Enum.

Fixes #3

Type of change

• Bug fix (non-breaking change which fixes an issue)

Checklist:

• I have run the pre-commit checks with pre-commit run --all-files (see CONTRIBUTING.md instructions to set it up)

[pseudo-rnd-thoughts]

Could we change the implementation on line 41 instead for it to be Actions.UP.value as I think this is still clear what is happening but means we don't need to do this conversion step.

[pseudo-rnd-thoughts]

I just realised that I have already made this change over in Gymnasium but not here
https://gymnasium.farama.org/main/tutorials/gymnasium_basics/environment_creation/#sphx-glr-tutorials-gymnasium-basics-environment-creation-py

[SarvagyaVaish]

Could we change the implementation on line 41 instead for it to be Actions.UP.value as I think this is still clear what is happening but means we don't need to do this conversion step.

Yeah! That's better :)

[SarvagyaVaish]

@pseudo-rnd-thoughts Tests seem to be failing.

However, it's failing on the installation step. Not sure if it's the changes I introduced in this PR. Thoughts?

[pseudo-rnd-thoughts]

@kir0ul is looking into it so I wouldn't worry about it for now. I don't believe that your PR caused the issue

[kir0ul]

The issue was caused by some changes introduced by the Hatchling build backend (pypa/hatch#1089), hopefully PR #5 should fix it.