These are example images and config files for the GRIP vision pipeline development tool.
Unfortunately, the *.grip files contain the complete path to test images. So instead of for example just "rocket.png", the file will contain something like
<grip:ImageFile>
<property name="path" value="C:\Users\USERNAME\git\2393First\GRIP\rocket.png"/>
So before loading the file into GRIP, you might have to edit that file path.
Brief explanation of all operations: https://github.com/WPIRoboticsProjects/GRIP/wiki/Operation-Reference-Table
The "VisionProcessing" doc includes examples from previous years: https://wpilib.screenstepslive.com/s/currentCS/m/vision