feat: Add audiobook-mcp server

- Build audiobook-mcp from TypeScript source (npm run build)
- Update STATUS.md: Mark audiobook-mcp-server as Built
- Update crush.json: Add audiobook MCP server to mcp section

Note: Uses npx entrypoint pattern similar to other MCP servers

crush.json

@@ -13,5 +13,11 @@
       "command": "docker",
       "args": ["run", "-i", "--rm", "KNELDevStack-AIMiddleware-marksman", "server"]
     }
+  },
+  "mcp": {
+    "audiobook": {
+      "command": "docker",
+      "args": ["run", "-i", "--rm", "KNELDevStack-AIMiddleware-audiobook-mcp"]
+    }
   }
 }