add 'disabled: bool = False' kwarg to sp.pydantic_form

[liamvdv]

Feature description:
Please expose a 'disabled: bool = False' kwarg in sp.pydantic_form(). It should either disable all input fields or just disable the submit, both work.
I prefer to just disable the submit button, but thats a UI question.

Problem and motivation:
External state that prohibits the form to be send off. [Long Running API call following the Submit, Selection of another filed must happen first, ....]

Is this something you're interested in working on?
No