Move pydcs helper function out of db.

game/dcs/helpers.py

@@ -0,0 +1,20 @@
+from typing import Optional, Type
+
+from dcs.helicopters import helicopter_map
+from dcs.planes import plane_map
+from dcs.ships import ship_map
+from dcs.unittype import UnitType
+from dcs.vehicles import vehicle_map
+
+
+def unit_type_from_name(name: str) -> Optional[Type[UnitType]]:
+    if name in vehicle_map:
+        return vehicle_map[name]
+    elif name in plane_map:
+        return plane_map[name]
+    elif name in ship_map:
+        return ship_map[name]
+    if name in helicopter_map:
+        return helicopter_map[name]
+    else:
+        return None