Allow setting errorBehavior for entire form

[henryaj]

Thanks for your hard work on this project - it's making my life as a newly-minted CTO much easier! 🙏🏻

My request: it would be cool to be able to set errorBehavior (i.e. whether form warnings are shown on blur/submit/whatever) on the whole form, not just on individual inputs.

[henryaj]

(Unless there's already some way of doing this I haven't spotted!)