Add Formisch example to forms guide

[yet-another-tim]

Formisch is a modern headless form library that recently added support for React. It would be great to see an example of how to use Base UI forms with Formisch similar to the examples for RHF and TanStack Form.

Thanks for the amazing library!

[linear]

BAS-383

[flaviendelangle]

Maybe it's too soon to add support for it in our doc 👍

[yet-another-tim]

Same author as Valibot and co-author of the Standard Schema protocol.

[flaviendelangle]

If it is maintained by the author of Validabot, I'm sure that the downloads will very quickly increase.
But I would wait to confirm that there is some traction before adding it to our do.
The DX of the library looks cool btw 👌