Whimsical and poignant, Studio Ghibli’s animated films have resonated with people around the world. While there’s no doubting Hayao Miyazaki’s storytelling ability — he created “My Neighbor Totoro” and “Princess Mononoke” from scratch and first serialized “Nausicaa of the Valley of the Wind” as a manga — more than half of the stories adapted by the studio have clear connections to literature.