fix(clerk-js,elements,types,ui): Account for null in supported_first_factors

[dstaley]

Description

In certain situations (such as the email_link sign in flow), the API returns "supported_first_factors": null. Currently, our types expect this value to always be an array, which results in a runtime TypeError when we attempt to use any method on the value expecting an array.

Checklist

• npm test runs as expected.
• npm run build runs as expected.
• (If applicable) JSDoc comments have been added or updated for any package exports
• (If applicable) Documentation has been updated

Type of change

• 🐛 Bug fix
• 🌟 New feature
• 🔨 Breaking change
• 📖 Refactoring / dependency upgrade / documentation
• other:

[changeset-bot]

🦋 Changeset detected

Latest commit: 19af466

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 19 packages

Name	Type
@clerk/clerk-js	Patch
@clerk/elements	Patch
@clerk/types	Patch
@clerk/ui	Patch
@clerk/astro	Patch
@clerk/chrome-extension	Patch
@clerk/clerk-expo	Patch
@clerk/backend	Patch
@clerk/express	Patch
@clerk/fastify	Patch
@clerk/localizations	Patch
@clerk/nextjs	Patch
@clerk/clerk-react	Patch
@clerk/remix	Patch
@clerk/clerk-sdk-node	Patch
@clerk/shared	Patch
@clerk/tanstack-start	Patch
@clerk/testing	Patch
@clerk/themes	Patch

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