add deepmind mcts integration docs

[AnirudhMahesh13]

Pull Request Overview

Summary

Added a .md detailing how to integrate mctx library from google deepmind

Change Type

• Bug fix
• New feature
• Breaking change
• [ x ] Documentation
• Refactor
• Performance
• Other:

Related Issues

• Fixes: #
• Related: #

What Was Changed

Testing

• [ x ] Added/updated tests
• [ x ] All tests pass locally
• [ x ] Linter and type checks pass

Checklist

• [ x ] Follows style guidelines
• [ x ] Self-reviewed
• [ x ] Code is commented where needed
• [ x ] Documentation updated
• [ x ] No new warnings

Screenshots / Notes

[machine-moon]

Approved. No changes needed now, but I’d like to see a bit more detail in the docs. E.g., explain what "gumble" means, clarify if it can directly replace our current mcts.py, and give a quick recap of how MCTS works and how its key methods fit into the bigger picture.

Don’t want to let this hold you up on prototyping though!