test: reorganize, group, rename and improve tests suite

[darkgl0w]

Hello.

Following #198 proposal, this PR aims to :

• reorganize tests files
• group tests (using sub-tests) and improve tests descriptions
  • compress (global)
  • decompress (global)
  • compress (routes)
  • decompress (routes)
• rewrite and clean up tests
  • compress (global)
  • decompress (global)
  • compress (routes)
  • decompress (routes)

Note: This PR needs a little bit of work to be completed but early reviews are welcome ^^
Should close #198

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

[Fdawgs]

Lgtm so far. This would fall under a test change not a refactor though: https://www.conventionalcommits.org/en/v1.0.0/

[darkgl0w]

I have finished to work on this PR and TBH it was such a pain 🤣

Lgtm so far. This would fall under a test change not a refactor though: https://www.conventionalcommits.org/en/v1.0.0/

refactor are commits, that rewrite/restructure code, and however do not change any behavior so I thought it was best suited here with a test scope 😋