Poor error message when API rate limit is exceeded

[ospreyboi]

When a user exceeds their free API quota, mesa-llm
raises a 200 line LiteLLM exception with hundreds of lines
of JSON that is unreadable.

Steps to reproduce:

1. Set up Gemini free API key
2. Run the negotiation example
3. Exceed the quota

Expected output : Clear message telling user what happened and how to fix it
Actual output : 200+ lines of unreadable (for user) JSON error

I have a fix ready — a try/except block in module_llm.py
that catches RateLimitError and raises a clean readable message.

[MohidNaghman1]

Hey, I noticed this issue hasn't had a PR submitted yet. I'd like to take a stab at fixing this if it's still open — planning to add a try/except for RateLimitError in module_llm.py. Let me know if someone is already working on it!

[IlamaranMagesh]

Hey, this issue had a PR, and it was merged, #258. The issue can be closed by the maintainers. FYI @wang-boyu