“Yellow Bird,” styled after shows like “The Office” and “Schitt’s Creek,” is a new comedy aiming for laughs while exploring themes of happiness. The film unfolds within a small-town grocery store called "The Yellow Bird," focusing on Jake (Angus Benfield), a former PR specialist now working as a stock boy in his mid-forties, grappling with sobriety and self-doubt. A talking gnome—voiced by Brian Doyle-Murray—acts as …