It took one New Moon casting announcement to bring Alex Meraz from obscurity into the thick of Twilight mania. Out of all the wolf pack cast introduced, Meraz has clearly captured the public imagination with his shirtless photos and his piercing eyes. But who is Alex Meraz? We asked his mentor and friend, actor Raoul Trujillo, to give us a breakdown. HE'S, UM, PRETTY HOT (OKAY, THAT WAS OUR PO…