chore: downgrade @wordpress/use-recommended-components to warn

[justlevine]

What

Update the eslint config rules for @wordpress/use-recommended-components so they warn instead of error.

Why

@wordpress/ui isn't version stable and they're graduating new components every release. We want to make sure to build new components using the recommended components, but we shouldn't break CI.

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PR created automatically by Jules for task 2857431342261436016 started by @justlevine

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[Copilot]

Pull request overview

This PR adjusts the project’s ESLint configuration to reduce the severity of the @wordpress/use-recommended-components rule, allowing lint runs to surface the guidance without failing builds/CI.

Changes:

• Downgrade @wordpress/use-recommended-components from error to warn in the ESLint flat config.

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