feat: serve a JSON schema from website

[SimenB]

Summary

I have zero clue if this is gonna work or not 😅 If it does work though, this closes #11963

Test plan

Verify deployment preview

[netlify]

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[SimenB]

ignore whitespace (https://github.com/jestjs/jest/pull/14792/files?w=1) - I just added some meta properties at the end

[SimenB]

I'll add "@jest/schemas-30x": "npm:@jest/schemas@^30" etc later for different versions

[SimenB]

I'm not allowed to see the logs of the (currently failing) deployment 🙈

[mrazauskas]

Perhaps it would make sense to add schema URI to documentation? I mean, simply to use it in the JSON config example:

{
  "$schema": "https://jestjs.io/schema.json"
  "bail": 1,
  "verbose": true
}

[mrazauskas]

Just to add, some time ago I was playing with typescript-json-schema. It was able to take a plain TS interface and emit schema. All options of istanbul-reports were included in the schema. Or at least it seemed so. To make sure, I went on writing tests for the schema. That was overwhelming amount of work and this is where I gave up (;

[SimenB]

Perhaps it would make sense to add schema URI to documentation? I mean, simply to use it in the JSON config example:

{
  "$schema": "https://jestjs.io/schema.json"
  "bail": 1,
  "verbose": true
}

I think $schema is supposed to be the version of the JSON schema spec it's following?

I added a self link in https://github.com/jestjs/jest/pull/14792/files#diff-cf140d6648a6d236a6a5ce32888aa504827a65dd89139174ec30e7da8db128a4R23

[github-actions]

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