refac: RankColumn enum 추가, General의 명장 일람 타입 변경

hwe/sammo/ActionSpecialWar/che_무쌍.php

@@ -1,5 +1,7 @@
 <?php
 namespace sammo\ActionSpecialWar;
+
+use sammo\Enums\RankColumn;
 use \sammo\iAction;
 use \sammo\General;
 use \sammo\SpecialityHelper;
@@ -28,7 +30,7 @@ class che_무쌍 extends \sammo\BaseSpecial{
     public function getWarPowerMultiplier(WarUnit $unit):array{
         $attackMultiplier = 1.05;
         $defenceMultiplier = 0.98;
-        $killnum = $unit->getGeneral()->getRankVar('killnum');
+        $killnum = $unit->getGeneral()->getRankVar(RankColumn::killnum);
         $attackMultiplier += log(max(1, $killnum / 5), 2) / 20;
         $defenceMultiplier -= log(max(1, $killnum / 5), 2) / 50;
         return [$attackMultiplier, $defenceMultiplier];