Add back rosbag2_cpp::StorageOptions as deprecated

The struct was removed in #493, but in order
to avoid a hard-break for users coming from Foxy I've added it back with a deprecation
warning.

Signed-off-by: Jacob Perron <jacob@openrobotics.org>

rosbag2_cpp/include/rosbag2_cpp/storage_options.hpp

@@ -0,0 +1,27 @@
+// Copyright 2018, Bosch Software Innovations GmbH.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef ROSBAG2_CPP__STORAGE_OPTIONS_HPP_
+#define ROSBAG2_CPP__STORAGE_OPTIONS_HPP_
+
+#include "rosbag2_storage/storage_options.hpp"
+
+namespace rosbag2_cpp
+{
+
+using StorageOptions [[deprecated("use rosbag2_storage::StorageOptions instead")]] =
+  rosbag2_storage::StorageOptions;
+
+}  // namespace rosbag2_cpp
+#endif  // ROSBAG2_CPP__STORAGE_OPTIONS_HPP_