Use Node.js built-in test runner in templates

[piranna]

Prerequisites

• I have written a descriptive issue title
• I have searched existing issues to ensure the feature has not already been requested

🚀 Feature Proposal

In same spirit to #631, use the Node.js built-in test runner instead of tap, they are mostly compatibles and would remove an extra dependency.

Motivation

Use standard built-in modules and reduce dependencies.

Example

No response

[piranna]

I admit Node.js test runner is pretty new, just started on Node.js 18, so maybe it would be implemented behind a flag until all maintained versions have support for it (about two years from now) and later remove the flag and enable it by default.

[piranna]

Since now Node.js 18 is the oldest maintained version, can we implement this now? :-)

[mcollina]

Let's do it.

[piranna]

Great, I'll try to find some time to do a PR, I have just today created a new Fastify project and after upgrading dependencies, found that tap 18 has some compatibility issues when using ESM + Typescript, so the moment is perfect :-)