fix: recognize nesting feature detection in use-baseline

[Pixel998]

Prerequisites checklist

• I have read the contributing guidelines.

AI acknowledgment

• I did not use AI to generate this PR.
• (If the above is not checked) I have reviewed the AI-generated content before submitting.

What did you do?

/* eslint css/use-baseline: ["error", { available: 2022 }] */

@supports selector(&) {
  /* nesting parsing available */
}

What did you expect to happen?

No lint error, because selector(&) is a nesting feature-detection query.

What actually happened?

use-baseline reported:

Selector 'nesting' is not a 2022 available baseline feature.

What is the purpose of this pull request?

This PR fixes use-baseline so nesting feature-detection queries do not report a baseline violation.

What changes did you make? (Give an overview)

• Map NestingSelector (&) to the nesting selector in selector(...) support queries.
• Skip nesting baseline reports when nesting is feature-detected.

Related Issues

Is there anything you'd like reviewers to focus on?

[DMartens]

Changes LGTM, thanks