feat: support for cross-device row split (#1735)

examples/common/common.h

@@ -151,6 +151,7 @@ struct SDContextParams {
     bool eager_load             = false;
     std::string backend;
     std::string params_backend;
+    std::string split_mode;
     std::string rpc_servers;
     std::string effective_backend;
     std::string effective_params_backend;