Add extra tasks used in E3B paper

[mbhenaff]

This includes:

• adding N10 versions of MiniGrid envs
• adding versions with open doors, lava, monsters
• adding versions of skill-based tasks with restricted action spaces. The original versions with the full action space are marked by X-Full-v0 and the ones with the restricted action spaces are marked with X-Restricted-v0

[samvelyan]

This looks great @mbhenaff. Thanks a lot for your contribution.

Could you please install minihack in dev mode with pre-commit and push another commit? This is to make sure that black and flake8 are applied to the code for consistent style/formatting. If you apply black to any of the submitted python files (e.g. black minihack/envs/skills_wod.py), you'll already have a diff and can try to commit something. Pre-commit will apply formatting for you then. Let me know if you have any questions.