feat: support tailwind v4

[hyoban]

Pull Request Name

Description

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Fixes # (issue)

Type of change

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• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

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Test Configuration:

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Checklist:

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• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• Any dependent changes have been merged and published in downstream modules
• I have checked my code and corrected any misspellings

[hyoban]

@francoismassart I created a PR, feel free to make any modifications or releases

[brandonmcconnell]

The readme still points to #3 (closed), which points to this one (merged), indicating that it's not officially supported yet.

If it is, in fact, fully supported, should the readme be updated?

---

Nvm I see the other link in the readme points to the WIP alpha/v4 branch:
https://github.com/francoismassart/eslint-plugin-tailwindcss/tree/alpha/v4