fix: Update 'onCaughtError' type inference in 'RenderOptions' to work with React v19

[aicest]

Sorry for duplicating PR #1401, as the previous PR couldn't be reopened.
The entities library has released version v6.0.1 to correct its TS types, the PR changes should now pass type checks (#1401 (comment)).

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What: To fix incorrect onCaughtError type inference in RenderOptions.

Repro: https://codesandbox.io/p/sandbox/delicate-voice-7wnf7z?file=%2Ftest%2Frender.test-d.ts%3A6%2C5-6%2C28

Why: As explained above.

How: Update TS types.

Checklist:

• Documentation added to the
  docs site
• Tests
  - React v18 types: No impact
  - React v19 types: Fixed
• TypeScript definitions updated
• Ready to be merged
  

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[Copilot]

Pull request overview

This PR fixes TypeScript type inference for the onCaughtError option in RenderOptions to properly support React 19. The fix addresses an issue where the conditional type check was too strict, requiring the property to be non-optional when React 19's RootOptions defines it as optional.

Key changes:

• Updated the conditional type in RenderOptions to check for optional onCaughtError? instead of required onCaughtError
• Changed test file directive from @ts-expect-error to @ts-ignore to maintain compatibility with both React 18 and 19 type checking in CI

Reviewed changes

Copilot reviewed 1 out of 2 changed files in this pull request and generated 2 comments.

File	Description
types/index.d.ts	Made onCaughtError property optional in the conditional type check to match React 19's optional property definition
types/test.tsx	Updated test comments and TypeScript directive to use @ts-ignore for cross-version compatibility during CI testing

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[aicest]

Hi @eps1lon, could pls help push this forward? Thank you.

[github-actions]

🎉 This PR is included in version 16.3.2 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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