A packing line is spitting 200 colourful bags of Cheestrings snacks a minute as general manager Stephen Stokes gives me a tour of Kinisla’s dairy consumer foods factory in Charleville, Co Cork. “We’re at capacity and we’re looking at how to add more,” he tells me.  This is less than three years after the food manufacturer completed the latest extension to the plant at a cost of €30 million – including €5 million grant aid from Enterprise Ireland, adds Kinisla’s chief executive Pat Murphy.  This section of the company’s sprawling Charleville industrial campus now employs 270 staff on a 24/7…