Add RAN support (Batch/Single)

app.py

@@ -263,7 +263,7 @@ class TsgDocFinder:
             json.dump(output, f, indent=4, ensure_ascii=False)
     
     def get_workgroup(self, doc):
-        main_tsg = "tsg_ct" if doc[0] == "C" else "tsg_sa" if doc[0] == "S" else None
+        main_tsg = "tsg_ct" if doc[0] == "C" else "tsg_sa" if doc[0] == "S" else "tsg_ran" if doc[0] == "R" else None
         if main_tsg is None:
             return None, None, None
         workgroup = f"WG{int(doc[1])}" if doc[1].isnumeric() else main_tsg.upper()