feat: allow plex override

[davidmenendez]

Closes #22118

updates @carbon/type package to allow consumers to override the Plex font-family.

Changelog

Changed

• updates @carbon/type package to allow consumers to override the Plex font-family.

Testing / Reviewing

yarn test && yarn test -u as well as manual testing

PR Checklist

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• Reviewed every line of the diff
• Updated documentation and storybook examples
• Wrote passing tests that cover this change
• Addressed any impact on accessibility (a11y)
• Tested for cross-browser consistency
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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.05%. Comparing base (03ffff1) to head (df49b51).

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #22119      +/-   ##
==========================================
- Coverage   95.07%   95.05%   -0.03%     
==========================================
  Files         539      539              
  Lines       45093    45093              
  Branches     6517     6551      +34     
==========================================
- Hits        42874    42861      -13     
- Misses       2091     2104      +13     
  Partials      128      128              

Flag	Coverage Δ
main-packages	89.12% <ø> (ø)
web-components	97.87% <ø> (ø)

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[tay1orjones]

Interesting - so you're thinking just overriding the font family, not actually loading in other assets. Would there need to be a change to the resolver? Or document what would be needed there for someone overriding this?

carbon/packages/styles/scss/fonts/README.md

Line 78 in 864e94a

### Custom font src resolver

Would it make sense to be able to turn off the loading of plex if this was configured like this?