Use Drupal 11.4 fonts key for bundled font preloading

[jjroelofs]

Linked issues

• Fix Refactoring: use Drupal 11.4 fonts key for local font preloading #825

Solution

Add Drupal 11.4 fonts key to library definitions for the bundled LeagueGothic and ChunkFive fonts, enabling correct browser preloading. Update the font loading code to attach these as standard Drupal libraries instead of injecting raw HTML head elements. Also fix the missing crossorigin attribute on preload links for user-uploaded fonts.

Checklist

• I have read the CONTRIBUTING.md document.
• My commit messages follow the contributing standards and style of this project.
• My code follows the coding standards and style of this project.
• Bug fix (non-breaking change which fixes an issue).
• New feature (non-breaking change which adds functionality).
• Breaking change (fix or feature that would cause existing functionality to change).
• Need to run update.php after code changes.
• Requires a change to end-user documentation.
• Requires a change to developer documentation.
• Requires a change to QA tests.
• Requires a new QA test.
• I have updated the documentation accordingly.
• All new and existing tests passed.

[jjroelofs]

Thanks for the cleanup here. I found two issues that should be addressed before merging:

1. dxpr_theme.libraries.yml: the new fonts entries are YAML lists, but Drupal 11.4 expects font paths as keys with options, e.g.

fonts:
  fonts/leaguegothic/league_gothic-webfont.woff:
    preload: true

As written, core will not produce the intended font preload metadata and can hit missing/invalid font asset data during attachment processing. The Drupal change record documents the keyed structure: https://www.drupal.org/node/3585574.

2. features/sooper-fonts/fonts-theme-settings-controller.inc: bundled fonts now bypass _dxpr_theme_add_local_font() for all installs, but dxpr_theme.info.yml still advertises Drupal ^9.3 || ^10 || ^11. On Drupal versions before 11.4, the fonts key is not processed, so LeagueGothic/ChunkFive lose the previous manual preload behavior. Either the core requirement needs to move to Drupal 11.4+, or this should keep a version-guarded fallback for older supported cores.

I also checked the current PR state: CI is green, and php -l plus git diff --check pass locally.