Another local cupcake company crumbled this week, filing for bankruptcy after closing its Somerville store in August.Kickass Cupcakes filed for Chapter 7 bankruptcy, a proceeding used to liquidate a companys assets to pay off its debts. The company owes its creditors $263,000, according to court documents filed late Tuesday.Kickass opened in Davis Square in 2007 and had moved to a new location on Highland Avenue in...