Update TanStack Start adapter

[Balastrong]

The Start demo is currently broken, we should update @tanstack/react-form/start with the new createServerFn APIs

[Balastrong]

Also mentioning #1006 as it might be included here to investigate if we can remove @remix-run/node as a direct dependency

[austinm911]

Hi - would there an update here since Start is now in beta?

[discoverlance-com]

Any update on this? It seems not to be working.

In this example:

export const handleForm = createServerFn(
  'POST',
  async (formData: FormData, ctx) => {
    try {
      await serverValidate(ctx, formData)
    } catch (e) {
      if (e instanceof ServerValidateError) {
        return e.response
      }

      // Some other error occurred when parsing the form
      console.error(e)
      return new Response('There was an internal error', {
        status: 500,
      })
    }

    return new Response('Form has validated successfully', {
      status: 200,
    })
  },
)

It no longer works and I try to refactor but I don't know what to pass as the ctx, also should we use the validator to run the serverValidate function or we run it in our handler? And the response return no longer seems to work in the handler as the handler does not expect a response to be returned.