Add sidebar link in spicedb section

Author: samkim

pages/spicedb/modeling/_meta.json

@@ -8,5 +8,9 @@
   "migrating-schema": "Updating and Migrating Schema",
   "access-control-management": "Access Control Management",
   "access-control-audit": "Access Control Audit",
-  "attributes": "Incorporating Attributes"
+  "attributes": "Incorporating Attributes",
+  "dev-mcp-server": {
+    "title": "SpiceDB Dev MCP Server",
+    "href": "../../mcp/authzed/spicedb-dev-mcp-server"
+  }
 }