test: add e2e tests with playwright

[msebastianb]

Changes

• Add and configure playwright to the project
• Add command to run tests
• Implement some tests for current features

Closes #98

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

[Uzlopak]

Hmm. problem is, that automerge is in the ci.yml and playwright is not taken into account. So it could result in merging a PR despite the playwright wf failed.

[Eomm]

Hmm. problem is, that automerge is in the ci.yml and playwright is not taken into account. So it could result in merging a PR despite the playwright wf failed.

I think we could merge this new job in the existing one:
https://github.com/fastify/fastify-swagger-ui/blob/master/.github/workflows/ci.yml

then we can run playwright first if I'm not wrong

[Uzlopak]

maybe put everything into the test script of package.json/npm.

[Uzlopak]

Its odd because the integration tests should run after the unit tests, but it works for me...

But lets see what the others say.

[Fdawgs]

CI isn't happy :/

[msebastianb]

@Fdawgs WDYM?

[Fdawgs]

@Fdawgs WDYM?

It's happy now, don't worry 😊

[mcollina]

lgtm