fix: unify font-family with paragon component styles

[ihor-romaniuk]

Description

This pull request contains recommendations for fixing custom font-family and make it unified with all MFEs and Paragon components.
All MFEs must have the same default appearance and change them globally via brand-openedx component on demand.

Related Pull Requests

PR to the open-release/quince.master branch: #597
PR to the master branch: #598

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[mphilbrick211]

Hi @openedx/edx-infinity! This is ready after the master is merged. Thanks!

[sundasnoreen12]

PR LGTM

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