Include reverser information in power supply script

Author: cesarBLG

Source/Orts.Simulation/Common/Scripting/PowerSupply/LocomotivePowerSupply.cs

@@ -156,6 +156,11 @@ protected float MaxThrottlePercent
         /// </summary>
         protected float ThrottlePercent() => Locomotive.ThrottlePercent;
 
+        /// <summary>
+        /// Locomotive direction.
+        /// </summary>
+        protected Direction CurrentDirection() => Locomotive.Direction;
+
         /// <summary>
         /// Main supply power on delay
         /// </summary>