Don't kill your tree with kindness - it is a classic mistake of beginners (and I myself have been guilty of this).
Place the tree in shade, and don't do anything else. Don't prune, don't repot. Personally, I wouldn't fertilize until the tree recovers, since it appears that the tree has compromised roots. You can prune away the dead foliage AFTER the tree recovers once you know what is dead and what is simply stressed or shocked.