More sort and target options

core/src/mindustry/logic/RadarTarget.java

@@ -8,6 +8,7 @@ public enum RadarTarget{
     enemy((team, other) -> team != other.team),
     ally((team, other) -> team == other.team),
     player((team, other) -> other.isPlayer()),
+    attacker((pos, other) -> other.canShoot()),
     flying((team, other) -> other.isFlying()),
     boss((team, other) -> other.isBoss()),
     ground((team, other) -> other.isGrounded());