feat: ReportRepository 생성

Author: thisishwan2

src/main/java/bitnagil/bitnagil_backend/report/repository/ReportRepository.java

@@ -0,0 +1,9 @@
+package bitnagil.bitnagil_backend.report.repository;
+
+import bitnagil.bitnagil_backend.report.domain.Report;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface ReportRepository extends JpaRepository<Report, Long> {
+}