fix: 重命名文件前校验是否存在冲突 (#9488)

Co-authored-by: Aaron3S <chenyang@fit2cloud.com>

apps/ops/api/playbook.py

@@ -146,6 +146,8 @@ class PlaybookFileBrowserAPIView(APIView):
 
         if new_name:
             new_file_path = os.path.join(os.path.dirname(file_path), new_name)
+            if os.path.exists(new_file_path):
+                return Response({'msg': '{} already exists'.format(new_name)}, status=400)
             os.rename(file_path, new_file_path)
             file_path = new_file_path