Fixes #2214 by making the setErrors second signature partial, so not all form fields have to provided at the same time when calling setErrors on multiple form fields.

Error Handling Improvements:

• packages/react/src/useForm.ts: Modified the setError method in the InertiaFormProps interface and the useForm function to accept partial records for error types. [1] [2]
• packages/svelte/src/useForm.ts: Updated the setError method in the InertiaFormProps interface and the useForm function to handle partial errors. [1] [2]
• packages/vue3/src/useForm.ts: Changed the setError method in the InertiaFormProps interface and the useForm function to use partial records for error types. [1] [2]

Example Usage and Test Update (can be reverted if not needed):

• playgrounds/react/resources/js/Pages/Form.tsx: Added an example usage of the setError method to demonstrate setting multiple errors at once.