feat: add TV show trailer downloads, episode trailers, and movie/TV trailer separation

- Download trailers for TV shows from TMDB with separate sources and an
  independent max-count cap (0 disables a category)
- Play trailers before TV episodes via IIntroProvider, limited to the first
  episode a user watches each day
- Tag TV show trailers in their NFO so movies only get movie trailers and
  episodes only get TV show trailers

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Jellyfin.Plugin.CinemaTrailers4Jellyfins/Services/FakeMovieService.cs

@@ -56,7 +56,7 @@ namespace Jellyfin.Plugin.CinemaTrailers4Jellyfins.Services
         /// Writes a minimal Jellyfin/Kodi-compatible movie NFO with <lockdata>true</lockdata>
         /// so Jellyfin never tries to refresh metadata for the fake entry from TMDB.
         /// </summary>
-        public void WriteNfo(string nfoPath, string title, int? year, IReadOnlyList<string>? genres = null, string? mpaa = null)
+        public void WriteNfo(string nfoPath, string title, int? year, IReadOnlyList<string>? genres = null, string? mpaa = null, IReadOnlyList<string>? tags = null)
         {
             var settings = new XmlWriterSettings { Indent = true };
             using var writer = XmlWriter.Create(nfoPath, settings);
@@ -70,6 +70,9 @@ namespace Jellyfin.Plugin.CinemaTrailers4Jellyfins.Services
                     writer.WriteElementString("genre", genre);
             if (!string.IsNullOrWhiteSpace(mpaa))
                 writer.WriteElementString("mpaa", mpaa);
+            if (tags != null)
+                foreach (var tag in tags)
+                    writer.WriteElementString("tag", tag);
             writer.WriteElementString("lockdata", "true");
             writer.WriteEndElement();
             writer.WriteEndDocument();