Generate AccessibilityDisplayString from thorium-locales

[mickael-menu]

Changed

Shared

• Accessibility display strings are now sourced from the thorium-locales repository (instead of W3C's repository). Contributions are welcome on Weblate.

[Copilot]

Pull request overview

This PR migrates accessibility display strings from the W3C's publ-a11y-display-guide-localizations repository to the EDRLab's thorium-locales repository, enabling community contributions through Weblate. The change includes refactoring the localization generation scripts and updating the key naming conventions.

Changes:

• Replaced W3C accessibility localization source with thorium-locales repository
• Refactored build scripts to consolidate locale generation under a single convert-thorium-localizations.js script
• Updated locale structure from en-US.lproj to en.lproj and added Italian (it) translations

Reviewed changes

Copilot reviewed 13 out of 13 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
BuildTools/Scripts/generate-a11y-extensions.js	New script to generate Swift extensions from localization keys
BuildTools/Scripts/convert-thorium-localizations.js	Refactored to support both LCP and accessibility localizations with new a11y project configuration
BuildTools/Scripts/convert-a11y-display-guide-localizations.js	Removed (replaced by convert-thorium-localizations.js)
Makefile	Simplified locale update process to use single script and removed W3C-specific commands
Sources/Shared/Resources/en.lproj/W3CAccessibilityMetadataDisplayGuide.strings	Relocated from en-US to en and regenerated from thorium-locales
Sources/Shared/Resources/fr.lproj/W3CAccessibilityMetadataDisplayGuide.strings	New French translations from thorium-locales
Sources/Shared/Resources/it.lproj/W3CAccessibilityMetadataDisplayGuide.strings	New Italian translations from thorium-locales
Sources/Shared/Publication/Accessibility/AccessibilityDisplayString+Generated.swift	Regenerated with alphabetically sorted keys and renamed constants
Sources/Shared/Publication/Accessibility/AccessibilityMetadataDisplayGuide.swift	Updated to use renamed constants and added fallback logic for strings without compact/descriptive variants
Tests/SharedTests/Publication/Accessibility/AccessibilityMetadataDisplayGuideTests.swift	Updated test expectations for renamed constants and added fallback behavior tests
Support/Carthage/Readium.xcodeproj/project.pbxproj	Updated Xcode project to reference new locale directories
Support/Carthage/.xcodegen	Updated paths from en-US to en/fr/it locales
CHANGELOG.md	Documented the change to thorium-locales source

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