Add marketing site (/site) + agent-os toolkit + Pages workflow

[stevepaltridge]

Consolidates recall.works marketing site + agent-os toolkit into this repo

Until today the marketing site lived at stevepaltridge/recall.works. With Recall now the canonical home (PyPI ai-recallworks, npm @recallworks/recall-client, ghcr.io image, polished README), it makes sense to consolidate so visitors land in one place.

What this PR adds

• /site/ — 8 HTML pages with shared CSS, OG/Twitter/canonical SEO meta, JSON-LD, sitemap.xml, robots.txt, OG card (1200×630 PNG), and CNAME = www.recall.works.
  • index.html — landing page
  • whitepaper.html — full architecture whitepaper
  • pillars.html — six pillars
  • architecture.html — system topology + #networked anchor
  • brain.html — vendor-neutral MCP server explainer
  • hardware.html — sizing guide (Azure Blob storage stat)
  • comparison.html — vs SaaS memory products
  • quickstart.html — references this repo's Docker quickstart
• /agent-os/ — installable cold-start toolkit: bootstrap.ps1, install.sh, bin/*.ps1 helpers (vault-sync, brain-snapshot, transcript-tail, etc.), brain/ stub (recall.py, Dockerfile, compose), templates/ (routing/audit-trail/REVIVAL), docs/QUICKSTART.md. License: same as parent.
• .github/workflows/pages.yml — deploys /site/ to GitHub Pages on push to main when site/** changes.

Site link audit

All 17 GitHub URL refs in the site updated from stevepaltridge/recall.works → RecallWorks/Recall. The single remaining stevepaltridge reference is the JSON-LD author URL (https://github.com/stevepaltridge), which is correct — Steve is the author.

After merge — manual steps

1. Set repo Pages source to "GitHub Actions" (Settings → Pages)
2. Add custom domain www.recall.works in Pages settings
3. Update GoDaddy DNS: CNAME www from stevepaltridge.github.io. → recallworks.github.io.
4. Wait for cert provision; verify HTTPS at https://www.recall.works/
5. Disable Pages on stevepaltridge/recall.works, archive that repo
6. Update PR Add RecallWorks/Recall to Knowledge & Memory punkpeye/awesome-mcp-servers#6053 with corrected repo URL

Untested per Rule 7

• Pages workflow has not been validated against this repo's path layout (paths trigger fine in isolation but interaction with the existing 6 workflows is theoretical)
• HTTPS cert provisioning timing on the new binding is GitHub-side (typically 5–30 min)
• All site internal anchors verified mechanically (string replace) but not visually on the new URL until DNS is cut over