The claws are out in a Brooklyn cat-napping case. A borough woman who allegedly stole a beloved cat from a bodega was arraigned on petty larceny charges – and then furiously insisted Wednesday she was an “animal lover” who was unfairly arrested. “I’m going to sue them for accusing me of stealing,” Mary Sierra told The Post after being released on her own recognizance. The three-month-old kitten was nabbed from 8th St. Mini Mart in Park Slope on Thursday, with surveillance video capturing two people walking away with the cat. Sierra was released without bail.