Add public Fumadocs documentation site

[wasimxyz]

Summary

• Add a standalone, public, indexable Fumadocs app under docs/ that advertises how to install and configure Data Hub, deployable as its own Vercel project (root directory docs/).
• Ship an install-focused landing page plus ported user guides: installing a watcher, adding an instrument, upgrading the watcher, and managing tokens.
• Wire up markdown-for-agents endpoints (/llms.txt, /llms-full.txt, per-page .md + Accept content negotiation), built-in Orama search, and an "Ask AI" chat backed by the Vercel AI Gateway.
• Unlike the SSO-gated, noindex product app in web/, this site is public: it ships a sitemap, a permissive robots.txt, and SEO/OpenGraph metadata.
• Update references after the docs/ -> developer-docs/ rename (README, AGENTS, Makefile, .gitignore, code comments) and add docs-dev / docs-build / docs-lint Makefile targets.

Notes

• The docs app is standalone (its own package.json/lockfile) and intentionally not wired into make check-all, since it may later be split into its own repository.
• The Ask AI widget stays inert until AI_GATEWAY_API_KEY is set (or Vercel OIDC is available).

Test plan

• cd docs && npm install && npm run build succeeds.
• cd docs && npm run lint is clean.
• /llms.txt, /llms-full.txt, /sitemap.xml, and /robots.txt render.
• Deploy a separate Vercel project (root docs/) and set NEXT_PUBLIC_SITE_URL.
• make check-all still passes for the rest of the repo.

Made with Cursor

[vercel]

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Project	Deployment	Actions	Updated (UTC)
data-hub	Ready	Preview, Comment	Jun 25, 2026 9:28pm