Port Arabic assets

There is an additional file needed when processing PDF files.

It should be stored in assets.

https://gitlab.teklia.com/arkindex/tasks/-/blob/master/arkindex_tasks/import_files/assets/Arabic.json?ref_type=heads, used in https://gitlab.teklia.com/arkindex/workers/import/s3/-/blob/master/worker_bucket_import/pdf.py#L64