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.

app/src/main/java/com/github/damontecres/wholphin/MainActivity.kt

@@ -51,6 +51,7 @@ import com.github.damontecres.wholphin.services.ServerEventListener
 import com.github.damontecres.wholphin.services.SetupDestination
 import com.github.damontecres.wholphin.services.SetupNavigationManager
 import com.github.damontecres.wholphin.services.UpdateChecker
+import com.github.damontecres.wholphin.services.UserSwitchListener
 import com.github.damontecres.wholphin.services.hilt.AuthOkHttpClient
 import com.github.damontecres.wholphin.services.tvprovider.TvProviderSchedulerService
 import com.github.damontecres.wholphin.ui.CoilConfig
@@ -105,6 +106,9 @@ class MainActivity : AppCompatActivity() {
     @Inject
     lateinit var refreshRateService: RefreshRateService
 
+    @Inject
+    lateinit var userSwitchListener: UserSwitchListener
+
     @Inject
     lateinit var tvProviderSchedulerService: TvProviderSchedulerService