Adds serialization to observation and action managers#2234

kellyguo11 merged 2 commits intoisaac-sim:mainisaac-sim/IsaacLab:mainfrom

jsmith-bdai:feature/add_serialization_to_obs_and_action_managersjsmith-bdai/IsaacLab:feature/add_serialization_to_obs_and_action_managersCopy head branch name to clipboard