chore: update benchmark-compare and github action

[pi0]

I was trying to test changes in #163 in my fork, it seemes benchmark-compare is stalled and not working and containes lots of duplicate logic. So I tried to rewrite and improve it. Also updated github action accordingly to use node LTS, new compare -u script to update readme and github-actions-x/commit to simplify commit and push step. Tried action and script in my fork with a subset of benchmarks/.

Note: Percentage flavor is removed since wasn't sure this PR and that feature is still wanted or not

Checklist

• run npm run test and npm run benchmark
• tests and/or benchmarks are included
• documentation is changed or added
• commit message and code follows the Developer's Certification of Origin
  and the Code of conduct

[RafaelGSS]

I've tested locally and seems to work. But, I'll wait for another approval from the team since I didn't work in this repo for a while.

[mcollina]

go ahead and land @RafaelGSS, I won't have time to review. If it works locally for you it's good.

[RafaelGSS]

Thanks @pi0!