[#6] feat: Create PitchHistoryDTO

투구 기록을 담을 DTO 생성

BE/baseball/src/main/java/team9/baseball/DTO/response/PitchHistoryDTO.java

@@ -0,0 +1,22 @@
+package team9.baseball.DTO.response;
+
+import lombok.AccessLevel;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Getter;
+import team9.baseball.domain.aggregate.game.PitchHistory;
+
+@Getter
+@Builder
+@AllArgsConstructor(access = AccessLevel.PRIVATE)
+public class PitchHistoryDTO {
+    private String result;
+    private String log;
+
+    public static PitchHistoryDTO of(PitchHistory pitchHistory) {
+        return builder()
+                .result(pitchHistory.getResult().name())
+                .log(null)
+                .build();
+    }
+}