On a rainy Smith Street in Chinatown, the piercing pink of a neon sign beckons us into the bustling, vibrant space that is SingSing Thai Street Food. The decor inside Honolulu’s newest Thai eatery is a jangle of red, orange, pink, purple and aqua, and it works. It looks nothing like its predecessor in this space, Opal Thai, or any other restaurant in town. But is SingSing’s food as exciting as its looks?…