What type of roommate moves in with you barely talks to you unless you mention food and tells you to knock on their bedroom door if you have something

They're just a roomate so try not to take it personally. As long as they pay rent, all is cool. You don't need to be friends (I've been in a similar situation before. Yeah, it sucks and all because you think "how come we live together but this person is so detached?" but you remind yourself that you're not dating them and don't really neeed them, so...