feat(site): launch localized product landing

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What changed

• Separate the localized product landing at / from the canonical documentation hub at /docs.
• Add the Organizations guide and align the 41-document public registry with current product capabilities.
• Generate localized Markdown, MDX, LLM, Pagefind, sitemap, SEO and route contracts from maintained sources.
• Add the Product Hunt featured badge and retain OpenSSF project badges.
• Upgrade @cloudflare/nimbus-docs to 0.9.0 and migrate the required localized metadata patch.

Related issues

N/A

Type of change

• feat
• fix
• docs
• refactor
• perf
• test
• build / ci / chore
• Breaking change

Checklist

• All commits are signed off (git commit -s, DCO 1.1)
• Commit messages follow Conventional Commits 1.0.0
• pnpm run check passes locally. Not run as a full-repository gate; focused gates are listed below.
• pnpm test passes locally. Not run as a full-repository suite; focused Site and contract suites are listed below.
• Tests updated for the affected public routes, generation and documentation contracts
• UI strings changed: ran Lingui extract/compile workflow and committed catalogs
• Documentation updated in docs/design/, docs/protocols/ and deployment/API contracts
• No secrets, .env files, real tokens, private keys or real tenant data in the diff
• AI configuration edited in .stdai/standards/ and synchronized with drift 0

Verification

• pnpm --dir apps/site check: PASS, including Nimbus 0.9 env/structure/authoring/types and Astro diagnostics
• pnpm --dir apps/site test: PASS, 298 tests
• pnpm --dir apps/site build: PASS, 352 HTML pages plus 352 Markdown and 352 MDX twins
• Dist audit: PASS for Pagefind, sitemap, locale navigation, LLM indexes, aliases and localized 404s
• i18n audit: PASS
• protocol source-map: PASS, 51 tests
• docs translations: PASS, 49 tests
• web route ownership: PASS, 19 tests
• generated content source check: PASS, changed=false
• stdagent dry-run/status: PASS, 0 written and drift=0
• frozen offline lockfile install: PASS

Risk and unverified boundary

• Desktop/mobile screenshot QA is UNKNOWN because no Browser or Chrome instance was connected in the execution environment. Static HTML, responsive source rules and the complete dist audit passed.
• The localized Nimbus head patch remains required because 0.9.0 does not yet expose the per-page locale, social alt and LLM-index overrides used by XID.

Breaking change / migration notes

No API or identity runtime migration. The public Site intentionally changes / from the docs hub to the product landing and makes /docs the canonical documentation hub; registered historical detail aliases retain one-hop redirects.