Writer-director Megan Park may have created the runaway hit of the summer with the teen drama Sterling Point, which captures all of Gen Z’s messiness to a T. So how is she celebrating her success? She’s trapped in bed with a busted foot. “Funny enough, I broke my toe at the premiere of the show. And then because my toe’s all messed up, I was walking funny and twisted my ankle. So now the whole foot is just done,” Park says by Zoom from her bed …