Integrate Cone Detection Nodes with Stereocam

[gmin7]

Description:

• After this issue is addressed, the cone detection ROS network subscribes to the stereocam image topic and performs inference on it

Acceptance Criteria:

• Load in the IGVC Gazebo simulation with stereocamera to see images (may involve fine tuning the camera orienatation of the model)
• Replace hard coded image with the stereocam topic
• SLAM repo compiles, and the cone detection image subscriber successfully reads image messages from the stereocam topic
• The model with the custom weights successfully reads an image in and runs it through the trained model