Peninsula Hospital, hobbled by a partial state-imposed shutdown, told more than 200 employees on Friday they were being laid off. The hospital, which is struggling to come out of bankruptcy, also agreed to let a trustee appointed by its creditors oversee operations. State Health Department officials ordered a shutdown of the Far Rockaway hospital's lab on Feb. 23 after finding expired plasma in the blood bank and other violations. Patients were transferred out and ambulances have been diverted to other facilities. Some services, such as radiology, are continuing, but with a much smaller contingent of employees.