NEW YORK — Former Ukrainian Prime Minister Yulia Tymoshenko is suing businessman Dmitry Firtash and Swiss-based RosUkrEnergo in U.S. court, alleging fraud, human rights violations and racketeering. According to court papers filed Tuesday in the U.S. District Court in Manhattan, Tymoshenko accused the defendants, who include 100 unidentified “John Doe” individuals and companies, of defrauding Ukraine’s citizenry by manipulating an arbitration court ruling, “undermining the rule of law in Ukraine.” […]