The attorney general’s office announced a federal lawsuit against three Chinatown employment agencies and two suburban restaurants, alleging wide-ranging wage and civil rights violations of immigrant and Latino workers in the Chicago area.The complaint alleges the agencies sought out Latinos for employment in buffet-style restaurants, which paid as little as $3.50 an hour and discriminated against the workers based on race and national origin.The agencies and restaurants are also accused in the filing late last week …