feat!: rework

[climba03003]

I would like to gather initial though on the implementation likes the previous one.
I do not plan to support more tools at this stage, mocha, tap, standard, etc.
Let's focus on the implementation.

You can use npx fastify-dev for development, it can skip the build step and use directly.
npx fastify for checking the built one.

Mentions someone that are interested.
cc @jean-michelet

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

[jean-michelet]

Do you plan to continue?

[climba03003]

I don't have idea how to push this forward. There is no feedback on the implementation.

[jean-michelet]

I will test your work this week-end and give you UX feedback.