Request on adding Gridworld environment to the list

Nice job to Huggingface team. I would like to suggest adding the Gridworld environment to the list of environments, adding in random initial positions of agents (and even the pits).
Thanks in advance.

The issue names no file, test, or entry point. Locate the current list of environments in the blog repository, then clarify the intended Gridworld content and how random initial positions for agents and pits should be represented before defining completion.

Written by the indexing model from the issue text.