Add 'route' to each RbxInstance, which tags how the instance was generated

src/plugins/json_model_plugin.rs

@@ -36,6 +36,8 @@ impl Plugin for JsonModelPlugin {
                     },
                 };
 
+                rbx_item.route = Some(vfs_item.route().to_vec());
+
                 rbx_item.properties.insert("Name".to_string(), RbxValue::String {
                     value: rbx_name,
                 });