Support (some) design tokens in Formio WYSIWYG content

[sergei-maertens]

Thema / Theme

Frontend

Omschrijving / Description

WYSIWYG content in the frontend has recently been upgraded to support some utrecht-parapgraph design tokens, as part of #4545 (PR). However, this currently only applies to WYSIWYG content outside of Formio.

The same pattern should be applied to the .openforms-formio-content container so that we get consistent styling for all WYSIWYG content, irrespective of its origin.

Added value / Toegevoegde waarde

• Controlling the appearance with a single set of design tokens, using NL Design System
• Consistent appearance through the entire form, even when operating in the Formio domain

Aanvullende opmerkingen / Additional context

We need to make breaking changes to fully support all Utrecht Paragraph design tokens, so that is postponed.

[sergei-maertens]

Related issue/discussion: #4573