useFormFields should not return dispatchFields

[tyteen4a03]

Currently, useFormFields can be used in one of two ways: It can either return fields via a selector, or return a dispatchFields function. You cannot make it return both at the same time via array destructuring.

  const theFieldYouWant = useFormFields(([fields,dispatch]) => (fields && fields?.theFieldYouWant) || null)
  const dispatchFields = useFormFields(([fields,dispatch]) => dispatch)
  
  // not a thing
  const [theFieldYouWant, dispatchFields] = useFormFields(([fields]) => (fields && fields?.theFieldYouWant) || null)

This muddles up the return value and the DX is suboptimal. I think useFormFields should stop returning dispatchFields and instead force the use of useForm or useWatchForm hooks.