EXCLUSIVE: Michael Sugar, longtime manager-producer at Anonymous Content, has formed Sugar23, a producing shingle that launches with a multi-year first-look deal with Anonymous Content. It changes the dynamic of Sugar’s relationship with the company and allows for his growing producing ambitions while keeping him in the fold. Sugar, the Oscar-winning producer of Spotlight and whose credits include The Knick, The OA, the upcoming Maniac and One Day She'll Darken, will…