feat: Add perf benchmark tests (with breaking changes due to ESM updates)

[jaybhanushali3166]

This PR closes #40. However, as part of the changes, I updated some dependencies and module handling, which has caused issues with the linting and test setup.

1. Linting Issue: The .eslintrc.js configuration is outdated, and it's not compatible with ESM-based module execution. The recommended setup for modern ESlint is to migrate to eslint.config.js. I’ve found a migration guide here, however this tool works great for static config and will need careful implementation for dynamic config.
2. Test Issue: The Mocha test setup is using a CommonJS approach, which might require an upgrade to support ESM modules fully. This has led to test failures.

I'd appreciate guidance on how best to resolve these issues, particularly regarding ESM module support and Mocha compatibility.

[CLAassistant]

All committers have signed the CLA.

[wemeetagain]

Thanks for the PR, several comments:

• ESM - we definitely want to do this, it may be prudent to do this as a separate PR and cut a breaking release
• linting - we're now using biome, check out how we're doing it in the lodestar repo
• testing - we're now using vitest, check out how we're doing it in the lodestar repo
• benchmarking - we're now using @chainsafe/benchmark (check out how we're doing it in the lodestar repo)