Migrate ServerEventNotifier.OnUserUpdated to IEventConsumer

Jellyfin.Data/Events/Users/UserUpdatedEventArgs.cs

@@ -0,0 +1,18 @@
+using Jellyfin.Data.Entities;
+
+namespace Jellyfin.Data.Events.Users
+{
+    /// <summary>
+    /// An event that occurs when a user is updated.
+    /// </summary>
+    public class UserUpdatedEventArgs : GenericEventArgs<User>
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="UserUpdatedEventArgs"/> class.
+        /// </summary>
+        /// <param name="arg">The user.</param>
+        public UserUpdatedEventArgs(User arg) : base(arg)
+        {
+        }
+    }
+}