Reframe the Case reading paths

[jmchilton]

What changed

• Replace the equal card grid on The Case landing page with a guided reading map:
  • one flagship trailhead;
  • two parallel argument branches;
  • FAIR as an audience-specific outside lens;
  • Comparisons as the field map.
• Remove the Related Projects page rather than promoting its instance-specific inventory into Comparisons.
• Repair the resulting inbound links and update the sitemap/canon.
• Leave Comparisons substantively unchanged; its only content edit points the former values-table reference to The Diff.
• Track the possible future integration of jeanibarz/knowledge-base-mcp-server separately in Evaluate jeanibarz/knowledge-base-mcp-server for the Comparisons landscape #45.

Why

The Case is expected to grow, but its pages do not all perform the same role. The landing page now communicates those roles without forcing a single linear sequence or merging the arguments into a mega-document. Removing Related Projects also avoids presenting projects inherited from one Foundry instance as pattern-level prior art without a selection rule.

Validation

• npm test — 22 tests passed
• npm run typecheck — no errors (one existing unused-variable hint)
• npm run build — 28 pages built; wiki-link check clean
• git diff --check