feat: arabic i18n

[skaldebane]

Adds Arabic locale. Stacked on top of #263, and can only be merged after its base PR is merged.

• Arabic strings
• Adds pluralization for found_packages in English to match, other languages may follow
• Supplies the plural parameter to various $t calls for pluralization to work
• Adds search.header, used in the search results header, on all languages, copied from nav.search.

There's still no rtl or lang wiring to the html element.
That was part of #245, and may be redone as a separate PR.
See #275.

Any UI adjustments for rtl will follow in a separate PR.

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Project	Deployment	Review	Updated (UTC)
docs.npmx.dev	Ready	Preview, Comment	Jan 29, 2026 4:03am
npmx-lunaria	Error		Jan 29, 2026 4:03am
npmx.dev	Ready	Preview, Comment	Jan 29, 2026 4:03am

[github-actions]

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Warnings reference

Icon	Description
🔄️	The source for this localization has been updated since the creation of this pull request, make sure all changes in the source have been applied.