[Bug Report] Docu link to `minigrid/core/constants.py` broken

[turbotimon]

Describe the bug

In many environment pages, there is this sentence, but the link is broken.

OBJECT_TO_IDX and COLOR_TO_IDX mapping can be found in minigrid/core/constants.py

e.g. here: https://minigrid.farama.org/main/environments/minigrid/DoorKeyEnv/#observation-encoding

Possible should point directly to gitub? https://github.com/Farama-Foundation/Minigrid/blob/master/minigrid/core/constants.py

Checklist

• I have checked that there is no similar issue in the repo (required)

[pseudo-rnd-thoughts]

Could you make a PR to fix this

[turbotimon]

Happy to do so, however need some help to get started as i'm not (yet) familiar with sphinx..

I think it would be best if the /minigrid/core/constants.py would also be rendered under https://minigrid.farama.org/_modules/ so we can directly link to it (and to the right release version). I don't think link it directly to github is a good idea..

If that is not possible, I would change the text like this (italic is new):

• OBJECT_TO_IDX and COLOR_TO_IDX mapping can be found in the repo under minigrid/core/constants.py

What do you think?

[pseudo-rnd-thoughts]

Apologies for not originally replying, yes this is a good idea