Refactor move attribute logic and add arena trap moves

src/system/auto-play.ts

@@ -65,10 +65,7 @@ export function initAutoPlay() {
         let maxEffectiveness = 0.5;
         for (let m of attacker.moveset) {
             const moveType = m.getMove().type;
-            const defenderTypes = defender.getTypes();
-            let effectiveness = getTypeDamageMultiplier(moveType, defenderTypes[0]);
-            if (defenderTypes.length > 1)
-                effectiveness *= getTypeDamageMultiplier(moveType, defenderTypes[1]);
+            const effectiveness = defender.getAttackMoveEffectiveness(moveType);
             if (effectiveness > maxEffectiveness)
                 maxEffectiveness = effectiveness;
         }