Refactor Jellyfin plugin: UI integration, backend contract, and STRM creation.

- Integrated "Recommend Film", "Add Movie (STRM)", and Rating UI into Jellyfin web interface.
- Implemented full library sync (metadata with poster URLs, user states) with library filtering support.
- Added support for creating films via .strm file generation.
- Updated MovieNightBackendClient to support sync, recommendations, ratings, and viewed status.
- Added proxy endpoints to MovieNightController for frontend-backend communication.
- Ensured compatibility with Jellyfin 10.11.x and .NET 9.0.

Co-authored-by: devitq <118541411+devitq@users.noreply.github.com>

plugins/jellyfin/Jellyfin.Plugin.MovieNight/Configuration/config.js

@@ -11,6 +11,8 @@ const movieNightConfigPage = {
         view.querySelector("#ApiToken").value = config.ApiToken || "";
         view.querySelector("#SyncIntervalMinutes").value =
           config.SyncIntervalMinutes || 30;
+        view.querySelector("#StrmOutputPath").value =
+          config.StrmOutputPath || "";
         view.querySelector("#Enabled").checked = config.Enabled || false;
         view.querySelector("#EnablePeriodicSync").checked =
           config.EnablePeriodicSync !== false;
@@ -39,6 +41,7 @@ const movieNightConfigPage = {
           form.querySelector("#SyncIntervalMinutes").value || "30",
           10,
         );
+        config.StrmOutputPath = form.querySelector("#StrmOutputPath").value;
         config.Enabled = form.querySelector("#Enabled").checked;
         config.EnablePeriodicSync =
           form.querySelector("#EnablePeriodicSync").checked;