Add Super Fang target benefit score

src/data/move.ts

@@ -521,6 +521,10 @@ export class TargetHalfHpDamageAttr extends FixedDamageAttr {
 
     return true;
   }
+
+  getTargetBenefitScore(user: Pokemon, target: Pokemon, move: Move): number {
+    return target.getHpRatio() > 0.5 ? Math.floor(((target.getHpRatio() - 0.5) * 24) * 12 - 4) : -20;
+  }
 }
 
 export class MatchHpAttr extends FixedDamageAttr {