chore: update frontend-build in example to use ^14

[brian-smith-tcril]

Description

This updates the frontend-build dependency in the example directory's package.json to ^14. This removes a ton of duplicated deps from the lockfile.

One issue that came from this is gatsby (used for building the docs site) still depends on an older version of style-loader, so that version is getting hoisted. Claude made a little patch to the example webpack config to make sure we load the frontend-build version.

The config change is completely isolated to the example directory, and won't impact any consumers of Paragon.

LLM usage notice: example/webpack.dev.config.js change written by Claude.

Other notes:

• Needed to do a full lockfile regen
• Had to force a dependency of the docs site to a not-latest version (they landed a change that requires typescript 5 as a minor). I did it as lockfile-only and left my reasoning in react-hook-form v7.66.0 requires typescript 5.x #4218

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.40%. Comparing base (5dc0196) to head (20c5bc6).
⚠️ Report is 3 commits behind head on release-23.x.

Additional details and impacted files

@@               Coverage Diff                @@
##           release-23.x    #4217      +/-   ##
================================================
+ Coverage         94.39%   94.40%   +0.01%     
================================================
  Files               242      242              
  Lines              4296     4306      +10     
  Branches           1021      981      -40     
================================================
+ Hits               4055     4065      +10     
- Misses              233      237       +4     
+ Partials              8        4       -4     

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[openedx-semantic-release-bot]

🎉 This PR is included in version 23.20.4 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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