Dan Slevin reviews Wonka, the origin story of the magical musical confectionery maker, starring Timothée Chalamet; Chicken Run: Dawn of the Nugget, the long-awaited sequel to the 2000 fowl animated classic from Aardman Studios, streaming on Netflix; and Showing Up, the new film from director Kelly Reichardt and actor Michelle Williams about a struggling sculptor who finds that life keeps getting in the way of her work.