18 perc data file node

[dinodeep]

Pull Request

Addresses Issue #18 (PERC-Data-File-Node)

Description

Mostly a structural PR for Perceptions to make code a lot cleaner and well organized

• Removed perceptions dependency on ros2_numpy package (now using ros2_numpy_dv which is not a git submodule) (going to make a future PR where all submodules related to perceptions are no longer submodules and just have the _dv suffix)
• Created a FileNode class for saving data to the file system as npz files so that people can test with data without the need to run ROS nodes, making testing a more seamless for perceptions specific code (still encouraging people to test their code on Dale though)
• Created a PredictNode which provides an interface for performing predictions on ROS nodes
• Restructured code into folders for better modularity and cleanliness
• Created a ZEDNode that publishes raw camera data that the DataNode can synchronize and read from

Check-list

• Integration tests pass
• Code Documented (and Confluence documentation updated)
• Reviewer 1 approved