drill mined item sensing (#7460)

* add drill sensing

* PROPERLY

core/src/mindustry/world/blocks/production/Drill.java

@@ -266,6 +266,12 @@ public class Drill extends Block{
             dominantItems = returnCount;
         }
 
+        @Override
+        public Object senseObject(LAccess sensor){
+            if(sensor == LAccess.firstItem) return dominantItem;
+            return super.senseObject(sensor);
+        }
+
         @Override
         public void updateTile(){
             if(dominantItem == null){