Add integration with Jellyseerr/Seerr (#558)

## Description
This PR add the ability to integrate with a [Jellyseerr/Seerr
server](https://github.com/seerr-team/seerr).

### Features
- Login to the Seerr server using API Key, Jellyfin credentials, or
local Seerr credentials
    - Separate Seerr logins per user profile
- Search Seerr from the search page
- Discover media from Seerr on the nav drawer `Discover` page
    - Also from movie, series, or person pages
- Seamless integration with existing media, i.e. selecting media found
from Seerr that already exists on the Jellyfin server, will go directly
to the regular media page
- Mostly consistent UI between Jellyfin media & Seerr media
- Submit requests to Seerr
- Cancel submitted requests

### Screenshots

![discover](https://github.com/user-attachments/assets/f830b48f-e2f1-43f4-9680-9c6d4e071765)

### Related issues
Closes #54

## Acknowledgements

The `app/src/main/seerr/seerr-api.yml` file is copied & modified from
https://github.com/seerr-team/seerr/blob/develop/seerr-api.yml. I hope
to try to upstream some of the changes in the future.

settings.gradle.kts

@@ -9,9 +9,6 @@ pluginManagement {
         }
         mavenCentral()
         gradlePluginPortal()
-//        maven {
-//            url = uri("https://androidx.dev/snapshots/builds/14137143/artifacts/repository")
-//        }
     }
 }
 dependencyResolutionManagement {
@@ -19,9 +16,6 @@ dependencyResolutionManagement {
     repositories {
         google()
         mavenCentral()
-//        maven {
-//            url = uri("https://androidx.dev/snapshots/builds/14137143/artifacts/repository")
-//        }
     }
 }