After breaking out with her portrayal of an aspiring cartoonist who keeps an audio journal in 2015’s “The Diary of a Teenage Girl,” Bel Powley is set to pay tribute to one of the world’s most famous diarists. She’s signed on to lead Disney +’s “A Small Light,” a National Geographic limited series that’s based on the true story of a Dutch woman who risked her life to shelter Anne Frank’s family from the Nazis for more than two years and then preserved Anne’s diary , ”By Deadline. Susanna Fogel is directing the pilot and additional episodes. “A Small Light”...