solve without enemies, initial impl. still requires factoring out

app/helpers/irt_helper.py

@@ -1,8 +1,11 @@
+from typing import List
+
 from lib.irt.test_response_function import TestResponseFunction
 from lib.irt.test_information_function import TestInformationFunction
 
 from models.targets.tif_target import TifTarget
 from models.targets.tcc_target import TccTarget
+from models.item import Item
 
 def generate_tif_results(items, solver_run):
   targets = []