Move non-jellyfin extensions to separate project

src/Jellyfin.Extensions/Json/Converters/JsonPipeDelimitedArrayConverter.cs

@@ -0,0 +1,24 @@
+using System;
+using System.ComponentModel;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace Jellyfin.Extensions.Json.Converters
+{
+    /// <summary>
+    /// Convert Pipe delimited string to array of type.
+    /// </summary>
+    /// <typeparam name="T">Type to convert to.</typeparam>
+    public sealed class JsonPipeDelimitedArrayConverter<T> : JsonDelimitedArrayConverter<T>
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="JsonPipeDelimitedArrayConverter{T}"/> class.
+        /// </summary>
+        public JsonPipeDelimitedArrayConverter() : base()
+        {
+        }
+
+        /// <inheritdoc />
+        protected override char Delimiter => '|';
+    }
+}