add benchmark.py module

[mouayadkarimeh]

Features
Model Comparison: Benchmarks reasoning models vs. non-reasoning models
No-Think Option Support: Integrates with the /no_think parameter to test different model behaviors
RAG Integration: Supports benchmarking with and without RAG (Retrieval-Augmented Generation) concept

Work in Progress
Answer Comparison: Implementation for comparing generated answers and calculating accuracy percentages
Profile Function: Optimization of the profile() function for more reliable result demonstration and output formatting

[mouayadkarimeh]

The latest commit contains both pre-commit fixes and the increased ruff complexity limit simultaneously. It's not just the complexity increase — the entire benchmark.py file has been prepared and is ready for review.