feat: support design tokens and paragon 23

[dcoa]

Warning

This PR should not be merge to master directly, it should point to master-design-tokens once the branch has been created.

Description

This PR updates frontend app learner record to support CSS variables and the corresponding paragon design tokens.

Changes implemented

• Replace Paragon SCSS variables with CSS variables.
• Update frontend build

Important

This PR requires a compatible version with paragon 23 of dependencies because of that the following PRs need to be merged first:

• feat: adds support for loading external theme CSS for MFEs  frontend-platform#689
• feat: update dependecies that support css variables frontend-plugin-framework#105
• [BD-46] feat: added support Paragon design tokens frontend-component-header#351
• [BD-46] feat: added support Paragon design tokens frontend-component-footer#303

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.87%. Comparing base (85830d3) to head (265f232).
Report is 1 commits behind head on master-design-tokens.

Additional details and impacted files

@@                  Coverage Diff                  @@
##           master-design-tokens     #497   +/-   ##
=====================================================
  Coverage                 85.87%   85.87%           
=====================================================
  Files                        27       27           
  Lines                       439      439           
  Branches                    102      104    +2     
=====================================================
  Hits                        377      377           
  Misses                       61       61           
  Partials                      1        1           

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[brian-smith-tcril]

Overall this is looking great!

It seems to be doing the same thing as openedx/frontend-app-authn#1436 (comment) by moving away from @extending bootstrap utility classes. I'd like to make sure everyone is aligned on how to address that (it's very possible the conclusion will be "copying the utilities into the MFEs is best practice") before landing this.

[brian-smith-tcril]

Once this is rebased this one is good to merge!

[dcoa]

@brian-smith-tcril rebased :)