In “Turning Red,” 13-year-old Meilin (voiced by Rosalie Chiang) lives a very normal life, mostly. The only child in a warm Chinese Canadian family, she gets good grades at secondary school, hangs with her three besties, helps her mother run their ancestral family temple, enjoys her dad’s cooking and occasionally — in the way of 13-year-olds everywhere — gets a little dramatic. Oh, and sometimes she turns into a giant red panda. That’s the charming, offbeat concept at the center of the latest Pixar gem, the debut feature of director Domee Shi (whose enchanting Pixar short “Bao” screened with “I…