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.

gradle/libs.versions.toml

@@ -9,12 +9,14 @@ hiltCompiler = "1.3.0"
 hiltNavigationCompose = "1.3.0"
 hiltWork = "1.3.0"
 kotlin = "2.3.0"
+kotlinxCoroutinesCore = "1.10.2"
 ksp = "2.3.0"
 coreKtx = "1.17.0"
 appcompat = "1.7.1"
 composeBom = "2025.12.01"
 mockk = "1.14.7"
 multiplatformMarkdownRenderer = "0.39.0"
+okhttpBom = "5.3.2"
 programguide = "1.6.0"
 slf4j2Timber = "1.2"
 timber = "5.0.1"
@@ -38,6 +40,7 @@ preferenceKtx = "1.2.1"
 tvprovider = "1.1.0"
 workRuntimeKtx = "2.11.0"
 paletteKtx = "1.0.0"
+openapi-generator = "7.18.0"
 
 [libraries]
 aboutlibraries-core = { module = "com.mikepenz:aboutlibraries-core", version.ref = "aboutLibraries" }
@@ -73,10 +76,13 @@ auto-service-ksp = { module = "dev.zacsweers.autoservice:auto-service-ksp", vers
 desugar_jdk_libs = { module = "com.android.tools:desugar_jdk_libs", version.ref = "desugar_jdk_libs" }
 hilt-android = { module = "com.google.dagger:hilt-android", version.ref = "hilt" }
 hilt-android-compiler = { module = "com.google.dagger:hilt-android-compiler", version.ref = "hilt" }
+kotlinx-coroutines-core = { module = "org.jetbrains.kotlinx:kotlinx-coroutines-core", version.ref = "kotlinxCoroutinesCore" }
 mockk-agent = { module = "io.mockk:mockk-agent", version.ref = "mockk" }
 mockk-android = { module = "io.mockk:mockk-android", version.ref = "mockk" }
 multiplatform-markdown-renderer = { module = "com.mikepenz:multiplatform-markdown-renderer", version.ref = "multiplatformMarkdownRenderer" }
 multiplatform-markdown-renderer-m3 = { module = "com.mikepenz:multiplatform-markdown-renderer-m3", version.ref = "multiplatformMarkdownRenderer" }
+okhttp = { module = "com.squareup.okhttp3:okhttp" }
+okhttp-bom = { module = "com.squareup.okhttp3:okhttp-bom", version.ref = "okhttpBom" }
 programguide = { module = "io.github.oleksandrbalan:programguide", version.ref = "programguide" }
 protobuf-kotlin-lite = { module = "com.google.protobuf:protobuf-kotlin-lite", version.ref = "protobuf-javalite" }
 kotlinx-serialization-core = { module = "org.jetbrains.kotlinx:kotlinx-serialization-core", version.ref = "kotlinx-serialization" }
@@ -127,3 +133,4 @@ protobuf = { id = "com.google.protobuf", version.ref = "protobuf" }
 hilt = { id = "com.google.dagger.hilt.android", version.ref = "hilt" }
 room = { id = "androidx.room", version.ref = "room" }
 aboutLibraries = { id = "com.mikepenz.aboutlibraries.plugin.android", version.ref = "aboutLibraries" }
+openapi-generator = { id = "org.openapi.generator", version.ref = "openapi-generator" }