A chick chair might be helpful, until it's able to stand, so it can eat and drink comfortably.
Some examples in this thread:
https://www.backyardchickens.com/threads/versions-of-chick-chairs-please.1166308/
Is the foot only turned at the ankle? Are you able to move it into a more normal position? If the leg is twisted farther up, it may be something else, like a slipped tendon in the hock. If it will position correctly with help, then a splint may be effective there also. A shoe type that goes...