Currently, the Wikidata Bridge project [directly relies](
https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/extensions/Wikibase/+/f0667b2/client/data-bridge/package.json#101) on the [wikimedia-ui-base](https://github.com/wikimedia/wikimedia-ui-base) package for common design definition encoded in CSS variables (design tokens). This method, however, has been superseded with the introduction of [wikit-tokens](https://github.com/wmde/wikit/tree/master/tokens) which uses these values inherited from `wikimedia-ui-base`, but also expands on them.
In order to ensure a single source of truth on our design token, we would like to remove this dependency on `wikimedia-ui-base` and update usages of design tokens from it, to those defined in `wikit-tokens`.
Acceptance Criteria:
[ ] `wikimedia-ui-base` has been replaced with `wikit-tokens`
[ ] design token usages have all been updated accordingly