improv: added IUnitDirectionProvider.cs interface to replace directly accessing LockOnManager as part of generification of UnitMovementHandler.cs

Assets/Scripts/Core/IUnitTargetProvider.cs

@@ -0,0 +1,7 @@
+using UnityEngine;
+
+namespace Reset.Units{
+    public interface IUnitTargetProvider{
+        public GameObject UnitTarget{ get; }
+    }
+}