Segmentation fault caused by conflict between ion-kit and ROS Client Library in spdlog usage

A segmentation occurs at the end of a program when using ion-kit with the rcl in a C++ environment.

Both ion-kit and rcl utilize the `spdlog::logger` class and this caused ion-kit tries to access the logger instance after rcl cleans it up.

Tentatively we disabled the use of `spdlog::logger` by `set_level`, and we can test the change of the `spdlog:logger` in ion-kit to a local instance to avoid this conflict. Further testing is required to confirm if this solution effectively resolves this issue.

Start by reproducing the segmentation fault in a C++ program that uses ion-kit with the ROS Client Library, as described in the issue. Compare the tentative set_level change with using a local spdlog::logger instance in ion-kit; done means the program exits without a segmentation fault and the behavior is confirmed by further testing.

Written by the indexing model from the issue text.