Update `frontend-app-communications` to use Design Tokens

[brian-smith-tcril]

### Tasks
- [x] Create draft PR updating MFE to use Design tokens
- [x] Ensure draft PR is using released versions of `paragon`/`frontend-build`/`frontend-platform` from `npm`
- [x] Set up sandbox to test draft PR
- [x] Get draft PR approved
- [x] Create new `master-design-tokens` branch off of latest `master`
- [x] Update PR to point to `master-design-tokens`, move out of draft
- [x] Merge PR

[github-actions]

Thanks for your submission, @openedx/openedx-product-managers will review shortly.

[dcoa]

It has been worked openedx/frontend-app-communications#217