Marked atlas-local as an optional dependency

Author: jeroenvervaeke

package.json

@@ -96,7 +96,6 @@
   },
   "dependencies": {
     "@modelcontextprotocol/sdk": "^1.17.4",
-    "@mongodb-js-preview/atlas-local": "^0.0.0-preview.1",
     "@mongodb-js/device-id": "^0.3.1",
     "@mongodb-js/devtools-connect": "^3.9.3",
     "@mongodb-js/devtools-proxy-support": "^0.5.2",
@@ -122,6 +121,7 @@
     "node": "^20.19.0 || ^22.12.0 || >= 23.0.0"
   },
   "optionalDependencies": {
+    "@mongodb-js-preview/atlas-local": "^0.0.0-preview.1",
     "kerberos": "^2.2.2"
   }
 }