CNN  —  Party City filed for bankruptcy Saturday for the second time in less than two years. The filing comes after the retailer told employees Friday it would begin “winding down” operations. The nation’s largest party supply chain said in a statement that filing for Chapter 11 bankruptcy would “maximize value” for its stakeholders and close in the “most efficient manner.” Party City employees received letters on Friday that stores would close on February 28 . In the meantime, Party City said