Add "directory_prefix" or a similar convention for the "UploadHandler" to by able to upload folders while preserving file structure.

[alexandrutocar]

In current version of Remix (1.5.1) parseMultipartFormData transforms the part.filename to contain only the basename, meaning the directory relative path gets eventually lost by the time it hits UploadHandler. Could there be any way to preserver the path information or would it be a serious violation of RFC7578, mentioned in the source code of parseMultipartFormData?

Context of my question is directory upload, which in my case must include the relative path information of files uploaded.