Convert a public Google Form, Typeform, or Tally form into a new Clipform. Supported URLs: Google Forms (docs.google.com or forms.gle - must be shared as "Anyone with the link"), Typeform (form.typeform.com/to/...), and Tally (tally.so - must be public). The source form must be publicly accessible; a private form's questions cannot be read. The new Clipform is created as a DRAFT - review it, then republish with clipform_update_form (is_live: true) once it's ready. Some question types don't map cleanly to a Clipform node and are skipped rather than guessed at; the result always reports exactly what was imported vs skipped, and why.
