Add "Audiobookshelf" API

[max-horvath]

Format: openapi
Official: true
Url: https://raw.githubusercontent.com/advplyr/audiobookshelf/refs/heads/master/docs/openapi.json
Name: Audiobookshelf
Category: media
Logo: https://github.com/audiobookshelf/audiobookshelf-web/blob/master/static/Logo.png