Configure Astro Starlight i18n: English default, French as first additional locale

[Copilot]

Adds multi-language support to the Astro Starlight docs site, with English as the default/fallback and French as the first additional locale.

Changes

• docs/astro.config.mjs: Adds defaultLocale: 'root' and a locales block to the Starlight config:

defaultLocale: 'root',
locales: {
    root: {
        label: 'English',
        lang: 'en',
    },
    fr: {
        label: 'Français',
        lang: 'fr',
    },
},

Using root as the default locale keeps English served from root URLs (e.g., /setup/quick-start/) — no file moves, no broken links. French content lives under /fr/; until translations are added to src/content/docs/fr/, Starlight falls back to English automatically.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• telemetry.astro.build
  • Triggering command: /opt/hostedtoolcache/node/24.13.0/x64/bin/node node /home/REDACTED/work/gh-aw/gh-aw/docs/node_modules/.bin/astro build (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

Configure Astro to support localization for multiple languages. English is the default and the full fallback language. Add French as the first additional language.

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