Community node adds negative prompting to Krea 2 Turbo at CFG 1

Custom node enables negative prompting for Krea 2 Turbo and Krea2Edit at CFG 1, where standard CFG-based negatives have no effect. It uses a negative attention guidance (NAG) approach, avoiding the compute cost of a separate negative CFG branch that pushes the distilled Turbo model outside its intended regime.