ROCKFORD, MI — Family partnership, commitment to handcrafted food and a modern twist are breathing new life into a longstanding business. The Old Mill, located at 34 Squires St. in downtown Rockford, opened in November after refitting the interior of an iconic building to fit a more modern aesthetic. The restaurant, formerly known as Arnie’s, boasts a menu featuring beer-infused dishes and specialty cocktails, all steeped in rich history…