Is there a way to create a business process and/or form using the Forms API or any other way apart from doing manually?
Did you want to START an existing business process / form using the API or did you want to CREATE a new form / business process using an API?
If you're trying to start a process, you can using Workflow easily.
If you're trying to create a process, not currently.
In addition to starting a Forms process by a user submitting a form, you can automatically start a process on a schedule, or from a Workflow (which in turn can be triggered by other Forms processes, entry changes in the Repository, schedules, and users triggering business processes from the Repository).
Are you trying to automate a process promotion sequence? What are your use cases and requirements for a process import/creation API?
So far, being able to create a form adding the fields using some API instead of drag and dropping each field separately.