How do I begin EvalGen process?

Can you clarify how you can actually use EvalGen? I don't see anything in the UI for it after running `chainforge serve` and the instructions suggest `There is an interactive script to play with the functionality in test.ts. You can run it by running ts-node test.ts in the grading directory of the project. The terminal is a bit laggy sometimes.`, but I don't see a `grading` directory in the file structure