Canonicalization: migrate [&:has(…)] to has-[…] variant

[RobinMalfait]

This PR improves the canonicalization around arbitrary variants containing [&:has(…)], by converting them to has-[…].

Essentially when you have a variant, with &:has(…), we will convert it:

- [&:has([role=checkbox])]:flex
+ has-[[role=checkbox]]:flex

This also means that if the arbitrary selector inside of the &:has(…) can be converted to something that aligns with known variants, then we will do that as well:

  // `data-*` can be hoisted outside of the arbitrary value
- [&:has([data-slot=description])]:flex
+ has-data-[slot=description]:flex

  // `aria-visible="true"` can be entirely replaced by `aria-visible`
- [&:has([aria-visible="true"])]:flex
+ has-aria-visible:flex

Noticed this while looking into: tailwindlabs/tailwindcss-intellisense#1562

Test plan

1. Added additional tests for this use case
2. Existing tests still pass

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Walkthrough

Adds canonicalization for arbitrary &:has(...) selectors by converting them to the has-[...] variant form and continuing the variant-modernization loop after replacement. Includes tests validating conversion of nested :has patterns (including an aria-visible variant) into canonical has-* forms. Updates the changelog to document the canonicalization migration from [&:has(...)] to has-[...].

🚥 Pre-merge checks | ✅ 4

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately summarizes the main change: converting arbitrary :has() variants from [&:has(…)] to has-[…] form in canonicalization.
Description check	✅ Passed	The description is directly related to the changeset, clearly explaining the canonicalization migration with concrete examples and test plan.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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