* feat: allow presets to define prebuilds

* document prebuild parameters

* remove todo

* make gen

* Add integration testing

* Allow presets to define 0 parameters

* additional documentation for prebuilds

Adds `form_type` as a field to parameters. 
By default, legacy behavior is maintained by deducing the default `form_type` value from the existing inputs.

`styling` argument also added for cosmetic usage on the frontend form

To be backwards compatible using this repo as a library, use a string
alias. This allows using the 'type' as a `string` or the new enum.
Since enum validation is quite weak in Go, this is baiscally
functionally equvialent.