Initial commit: CinemaTrailers4Jellyfins plugin

Adapted from Trailers4Jellyfin: keeps TMDB/YouTube trailer downloading,
the scheduled task, language/source/date filters, and trailer rotation,
but drops cinema-mode/IIntroProvider entirely. Each trailer now ships in
its own fake-movie folder (placeholder video + locked NFO + trailer) for
use with a Cinema Mode / trailer pre-roll plugin.

Jellyfin.Plugin.CinemaTrailers4Jellyfins/Plugin.cs

@@ -0,0 +1,34 @@
+using System;
+using System.Collections.Generic;
+using Jellyfin.Plugin.CinemaTrailers4Jellyfins.Configuration;
+using MediaBrowser.Common.Configuration;
+using MediaBrowser.Common.Plugins;
+using MediaBrowser.Model.Plugins;
+using MediaBrowser.Model.Serialization;
+
+namespace Jellyfin.Plugin.CinemaTrailers4Jellyfins
+{
+    public class Plugin : BasePlugin<PluginConfiguration>, IHasWebPages
+    {
+        public override string Name => "CinemaTrailers4Jellyfins";
+
+        public override Guid Id => Guid.Parse("b581493e-1046-40ed-b6dc-cb8027624984");
+
+        public static Plugin Instance { get; private set; } = null!;
+
+        public Plugin(IApplicationPaths applicationPaths, IXmlSerializer xmlSerializer)
+            : base(applicationPaths, xmlSerializer)
+        {
+            Instance = this;
+        }
+
+        public IEnumerable<PluginPageInfo> GetPages()
+        {
+            yield return new PluginPageInfo
+            {
+                Name = Name,
+                EmbeddedResourcePath = GetType().Namespace + ".Configuration.config.html"
+            };
+        }
+    }
+}