meta object in useField/useForm should be a reactive type for transparancy

[soufian-madi]

I was not sure about the reactivity of the meta object even from the official documentaion. After reading through some gibhub discousiosns i understood that it should update when changes occur. I find it confusing that other obejcts from useField like errors are of type ref and are mentionend to be reactive reference but not for meta even though it is basically reactive.

I know that it should be treated as a readonly so maybe typing it as Readonly<Ref<>> can be an option. if this causes too much breaking changes a quick mention in the documentation would be nice for future devs.