Create launchfile for testing YOLO module with rviz and test image stream

[acmiyaguchi]

Here's an example of launching scripts using launchfiles: https://github.com/ivalab/GraspKpNet/blob/main/ros/gknet_perception/launch/demo.launch

We want to run the main module's script in a launchfile, and likely use rviz to visualize the camera and the regions of interest.