Added scraper for cover/fanart/poster images in the directory of the video file

[Phasetime]

Allows you to set any image with a particular naming pattern (cover, fanart, poster, etc.) inside the directory of the video file.

Could still use a few improvements though:

1. It should be using the GraphQL API to get the file path of the scene's video file instead of SQLite reading.
2. Should be allowed to set any directory you like as a base path for the search (maybe image files are in another folder but still named correctly)