refactor: 명령어 enum으로 분리 및 옵션 포함된 명령어 객체 추가

src/main/java/chess/domain/board/Board.java

@@ -23,10 +23,7 @@ public void move(final MoveOptions moveOptions, final boolean isWhiteTurn) {
         Position source = moveOptions.getSource();
         Position target = moveOptions.getTarget();
 
-        validateSourceOwner(enemy, source);
-        validateSamePosition(source, target);
-        validateTarget(player, target);
-        validateKingMovable(player, enemy, source, target);
+        validate(player, enemy, source, target);
 
         enemy.removePieceOn(target);
         movePiece(player, source, target);
@@ -39,6 +36,13 @@ private Player currentPlayer(final boolean isWhiteTurn) {
         return black;
     }
 
+    private void validate(final Player player, final Player enemy, final Position source, final Position target) {
+        validateSourceOwner(enemy, source);
+        validateSamePosition(source, target);
+        validateTarget(player, target);
+        validateKingMovable(player, enemy, source, target);
+    }
+
     private void validateSourceOwner(final Player enemy, final Position source) {
         if (enemy.hasPieceOn(source)) {
             throw new IllegalArgumentException("자신의 기물만 움직일 수 있습니다.");