[Feature] Add performance benchmarks to CI/CD pipeline #129

🤔 Problem Description

mesa-frames is primarily focused on speed and performance improvements. To maintain this focus, every PR merged into the main branch should be automatically benchmarked through CI/CD using GitHub Actions.
We can create a mesa-frames equivalent of the Mesa benchmarks workflow, ensuring consistent performance tracking on every pull request.

💡 Proposed Solution

• Add a benchmarks.yml GitHub Actions workflow
• Run mesa-frames examples as benchmark tests on PRs targeting the main branch
• Ensure benchmark results are visible and ready for review during the PR process

🔄 Alternatives Considered

No response

➕ Additional Context

No response