Force dark or light color scheme

On the ADR 0006 we discuted a way to force color scheme (dark or light) to ensure widget color scheme outside of django-admin. The two cases bellow is tested using UI regression tests. This is the same way that we implemented on default widget and this is documented here.

Light theme

To enforce light widget, use .iuw-light class:

<div class="iuw-light">
  {{ form }}
</div>

Dark theme

To enforce dark widget, use .iuw-dark class:

<div class="iuw-dark">
  {{ form }}
</div>