Feature support - Imperative form submission

[bombillazo]

Hello, I'd like to gather community support for this feature:

#12030

In a nutshell, this feature enables devs to submit a form by calling a submit function given by the form context instead of handling a callback and passing functions to the handleSubmit function wherever they need to run it. The idea is that you set up your form submit function at the hook level, and the submit function calls it for you.

I've implemented this already in production via patching the library, but have made this PR to incorporate it officially, but your support is needed to get traction.

Thanks for the feedback and ideas. So far, it's working great for us, and I know others have wanted a way to quickly submit a form without having to put everything that triggers the form inside Form Context.