[WIP] Bazarr integration

[Klubas]

Basic bazarr integration for radarr.

• Now you can create addons for your services, in this case bazarr is an addon for radarr or sonarr
• In the edit menu, now it's possible to search and download subtitles

Config example:

apis:
  movie:
    api_host: "http://radarr.localhost"
    api_key: "***"
  subtitles:
    api_host: "http://bazarr.localhost"
    api_key: "***"

services:
  - type: "Radarr"
    commands: ["movie", "m", "filme", "f"]
    api: "movie"
    name: "radarr"
    addons:
      - type: "Bazarr"
        service_name: "bazarr"
  - type: "Bazarr"
    commands: ["subtitles", "sub", "legenda", "l"]
    api: "subtitles"
    name: "bazarr"

TODO:

• [x] Allow user to go back to previous menu when searching for subtitles (I couldn't find a straight forward way to share the radarr state with the bazarr service)
• [ ] Show what subtitle is currently downloaded for each file (not sure if there is an api for this though)
• [ ] When this pull request is in a mergeable state, integrate it with sonarr too.
• [ ] Create bazarr service as standalone, in the current model it can only be called from a radarr/sonarr message.

Bazarr standalone:

• [ ] List wanted movies
• [ ] List wanted episodes
• [ ] Search wanted movie from wanted list
• [ ] Search wanted episode from wanted list
• [ ] Show providers status

[TrimVis]

First of all, thanks for the PR! Really looking forward to the result :)

Allow user to go back to previous menu when searching for subtitles (I couldn't find a straight forward way to share the radarr state with the bazarr service)

In general it feels like inheritance could solve your issues :) By inheriting from the Bazarr service, you can reuse its functionality and even call the corresponding super keyboard function etc directly from Radarr. (This should be similar, to how I'm doing it with the ExtArrService)