Support other design systems

[tvararu]

Like x-govuk/govuk-form-builder#127, is there any appetite to support the config.brand option in this library as well?

We're using the form builder option in a nhsuk-frontend project, and while we had to patch over the JS for the radio buttons, the rest of it seems to work. Having that option was a big help.

If it sounds good, maybe I could make a start on it.

[peteryates]

Yeah absolutely - I'd be more than happy to have that functionality here too.