add instructions and tutorial through ARC interface at the beginning

[wkvong]

we'll want to pick an ARC task (not in the set of tasks used in the experiment) that tries to use as many of the functions as possible

[wkvong]

brenden suggested looking at anselm's battleship code which had a very thorough tutorial at the beginning for using its grid-like interface in that task. I've reached out to him for the code so hopefully we can use that as a guide!