Include `paragonMessages` in MFE initialization

[adamstankiewicz]

@edx/paragon was recently upgraded to v20 in this MFE. v20 added a dependency on react-intl due to Paragon now shipping with already-translated English messages for its components.

Per the release notes, Paragon v20 now exposes a paragonMessages array containing the native translations for Paragon components but the paragonMessages are not yet passed to @edx/frontend-platform via the initialize function for this MFE.

Looks like importing and re-exporting paragonMessages in src/i18n/index.js(source) would do the trick 😃

### Tasks
- [ ] Ensure `paragonMessages` gets passed to the `initialization` so the hardcoded English strings throughout Paragon components use translations instead.
- [ ] Ensure Paragon is added to atlas pull (see comments)

[PKulkoRaccoonGang]

PRs:

• Frontend App Gradebook
• Frontend App Learning