[feature] Add ability to support your own subtitle through Plex or Jellyfin (Riven VFS)

[randrini]

Prerequisites

• [x] I have checked the existing issues and confirmed this feature has not already been requested
• [x] I have read the documentation and confirmed this feature does not already exist

Feature Category

• [x] Media Management
• [ ] Downloading
• [ ] Scraping
• [ ] Integration (Plex, Jellyfin, etc.)
• [ ] User Interface
• [ ] API
• [ ] Performance
• [ ] Security
• [ ] Documentation
• [ ] Other (please specify below)

Problem Statement

Proposed Solution

Alternative Solutions

Implementation Details

Technical Details (if applicable)

# Add technical details, code examples, or API specifications here

Additional Context

Contribution

• [ ] I would be willing to help implement this feature
• [x] I would be willing to test this feature

[Gaisberg]

No implementation required, im pretty sure Plex doesnt download the subtitle next to the media file.

I tested on Plex so if someone using Jellyfin could verify this is the case.