By Dan Lyons The Dallas great was asked about potential trade deadline moves for his former franchise. The Cowboys are in the heat of the playoff race, battling surprising Eagles and Giants teams at the top of a stacked NFC East. To keep pace, Troy Aikman—the former Cowboys Super Bowl-winning quarterback-turned-top broadcaster—says the team should add more offensive firepower. “You better have some offense in today’s NFL if you’re going to win games,” Aikman told TMZ when asked if the team should look to add a wide receiver at the trade deadline. “The way you have offense is you have weapons, …