chore: refresh collected sites — adopt vet, sync react-openapi bundle

collect.py run: adds the vet reference app (TypeDoc lib site + doc-weaver
MCP bundle), picks up the refreshed react-openapi specExtensions module from
Phase 1, and re-renders the docs homepage.

vet/mcp/index.json

@@ -0,0 +1,6 @@
+{
+  "project": "vet",
+  "type": "docforge-model",
+  "modules_count": 14,
+  "source": "doc-weaver"
+}