Public llms.txt on authenticated sites with mixed public/private docs

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For deployments with authentication enabled (e.g. JWT), allow /llms.txt to be fetched without login when we use "public": true on most nav. The file should only list URLs (and metadata) for pages that are already public—same as an anonymous visitor— and must not expose private / user-group content.

Why
Today support confirmed llms.txt is gated for any authenticated site, so tools and crawlers hit a login redirect even though most of our docs are intentionally public. We want public pages to be discoverable via llms.txt without duplicating a file off Mintlify.

Nice-to-have
Same rules for llms-full.txt or a dedicated public full export if the full file would otherwise leak private sections.