Move non-jellyfin extensions to separate project

MediaBrowser.Model/Entities/JsonLowerCaseConverter.cs

@@ -1,29 +0,0 @@
-#nullable disable
-// THIS IS A HACK
-// TODO: @bond Move to separate project
-
-using System;
-using System.Text.Json;
-using System.Text.Json.Serialization;
-
-namespace MediaBrowser.Model.Entities
-{
-    /// <summary>
-    /// Converts an object to a lowercase string.
-    /// </summary>
-    /// <typeparam name="T">The object type.</typeparam>
-    public class JsonLowerCaseConverter<T> : JsonConverter<T>
-    {
-        /// <inheritdoc />
-        public override T Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
-        {
-            return JsonSerializer.Deserialize<T>(ref reader, options);
-        }
-
-        /// <inheritdoc />
-        public override void Write(Utf8JsonWriter writer, T value, JsonSerializerOptions options)
-        {
-            writer.WriteStringValue(value?.ToString().ToLowerInvariant());
-        }
-    }
-}

MediaBrowser.Model/Entities/VirtualFolderInfo.cs

@@ -3,6 +3,7 @@
 
 using System;
 using System.Text.Json.Serialization;
+using Jellyfin.Extensions.Json.Converters;
 using MediaBrowser.Model.Configuration;
 
 namespace MediaBrowser.Model.Entities