Benchmark features: pause/resume, language breakdown, total api calls

[aj47]

This PR adds several enhancements to the benchmarking functionality:

1. Added ability to pause and resume benchmark
2. Updated language print formatting
3. Added enhanced benchmark metrics including API calls, retries, and language-specific pass rates

These changes improve the benchmarking experience and provide more detailed metrics for analysis.

[CLAassistant]

All committers have signed the CLA.