[Enhancement]: upload supplementary PDFs

[samuelvisser]

Type of Enhancement

Web Interface/Frontend

Describe the Feature/Enhancement

I want to be able to add supplementary PDFs to my audiobooks without having (or being able) to access the folder structure directly

Why would this be helpful?

My friend is kind enough to run an Audiobookshelf VM on his server I can use. But that means i can exclusively manage it though the web interface as i do not have direct access to the VM. In this scenario, is it currently impossible to upload supplementary PDF's because the uploader gives an error "directory already exists on the server". With supplementary PDFs, thats literally the point though. It should be in the same folder as the audio file

Future Implementation (Screenshot)

Either allow PDFs to be uploaded to an already existing directory, or better yet, create a new setting in the book editor under 'files' to upload a supplementary PDF. This avoids the hassle of making sure the folder structure for the PDF is exactly the same (no slight variations in book or author name, ect)

Audiobookshelf Server Version

2.12.1

Current Implementation (Screenshot)

[nichwall]

Duplicate of #1894

[samuelvisser]

Duplicate of #1894

This is not a duplicate, as my proposal is to add an uploader to book settings. Just allowing to add files to an existing folder would indeed work but would be a very annoying solution, as described in this issue