Refactor imports to use src alias

[jacobo-dominguez-wgu]

Description

Refactoring the imports to use the @src alias we can have cleaner imports and do imports like this:
import { useCourseInfo } from '@src/data/apiHook';
instead of:
import { useCourseInfo } from '../../../data/apiHook';

To achieve this it was needed to upgrade the frontend-base version and that included a paragon version upgrade to v23, some minor changes on styles were made to adopt this new version.

Warning

Waiting on openedx/frontend-base#116 to be merge to upgrade to that version of frontend-base

Supporting information

It depends on openedx/frontend-base#116.
It closes #76.

Testing instructions

Make sure all the components load properly and all test passes.

Best Practices Checklist

We're trying to move away from some deprecated patterns in this codebase. Please
check if your PR meets these recommendations before asking for a review:

• Any new files are using TypeScript (.ts, .tsx).
• Deprecated propTypes, defaultProps, and injectIntl patterns are not used in any new or modified code.
• Tests should use the helpers in src/testUtils.tsx (specifically initializeMocks)
• Use React Query to load data from REST APIs. See any apiHooks.ts in this repo for examples.
• All new i18n messages in messages.ts files have a description for translators to use.
• Imports avoid using ../. To import from parent folders, use @src, e.g. import { initializeMocks } from '@src/testUtils'; instead of from '../../../../testUtils'

[openedx-webhooks]

Thanks for the pull request, @jacobo-dominguez-wgu!

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