[#6] feat: Create GlobalExceptionHandler

BE/baseball/src/main/java/team9/baseball/exceptionHandler/GlobalExceptionHandler.java

@@ -0,0 +1,23 @@
+package team9.baseball.exceptionHandler;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.ResponseStatus;
+import org.springframework.web.bind.annotation.RestControllerAdvice;
+import team9.baseball.DTO.response.ApiResult;
+import team9.baseball.exception.NotFoundException;
+
+@RestControllerAdvice
+public class GlobalExceptionHandler {
+    @ExceptionHandler(RuntimeException.class)
+    @ResponseStatus(HttpStatus.INTERNAL_SERVER_ERROR)
+    public ApiResult runtimeExcpetion(Exception ex) {
+        return ApiResult.failed(ex);
+    }
+
+    @ExceptionHandler(NotFoundException.class)
+    @ResponseStatus(HttpStatus.NOT_FOUND)
+    public ApiResult notFoundException(Exception ex) {
+        return ApiResult.failed(ex);
+    }
+}