Design tokens

[arbrandes]

Description

An epic to group all the work being done for the adoption of Design Tokens.

Related issues and PRs

#### Paragon
- [ ] https://github.com/openedx/paragon/issues/1542
- [ ] https://github.com/openedx/paragon/issues/1543
- [ ] https://github.com/openedx/paragon/issues/1544
- [ ] https://github.com/openedx/paragon/issues/1545
- [ ] https://github.com/openedx/paragon/issues/1546
- [ ] https://github.com/openedx/paragon/issues/1548
- [ ] https://github.com/openedx/paragon/issues/1549
- [ ] https://github.com/openedx/paragon/issues/1938
- [ ] https://github.com/openedx/paragon/issues/1947
- [ ] https://github.com/openedx/paragon/issues/1948
- [ ] https://github.com/openedx/paragon/issues/1968
- [ ] https://github.com/openedx/paragon/issues/1969
- [ ] https://github.com/openedx/paragon/issues/1778
- [ ] https://github.com/openedx/paragon/issues/2014
- [ ] https://github.com/openedx/paragon/issues/2015
- [ ] https://github.com/openedx/paragon/issues/2016
- [ ] https://github.com/openedx/paragon/issues/2017
- [ ] https://github.com/openedx/paragon/issues/2018
- [ ] https://github.com/openedx/paragon/issues/2025
- [ ] https://github.com/openedx/paragon/issues/2026
- [ ] https://github.com/openedx/paragon/issues/2086
- [ ] https://github.com/openedx/paragon/issues/2089
- [ ] https://github.com/openedx/paragon/issues/2170
- [ ] https://github.com/openedx/paragon/issues/2269

#### MFEs
- [ ] https://github.com/openedx/frontend-app-profile/issues/770