Add MediaStreamProtocol enum (#10153)

* Add MediaStreamProtocol enum

* Add default handling for enum during deserialization

---------

Co-authored-by: Cody Robibero <cody@robibe.ro>

Jellyfin.Data/Enums/MediaStreamProtocol.cs

@@ -0,0 +1,20 @@
+using System.ComponentModel;
+
+namespace Jellyfin.Data.Enums;
+
+/// <summary>
+/// Media streaming protocol.
+/// </summary>
+[DefaultValue(Http)]
+public enum MediaStreamProtocol
+{
+    /// <summary>
+    /// HTTP.
+    /// </summary>
+    Http = 0,
+
+    /// <summary>
+    /// HTTP Live Streaming.
+    /// </summary>
+    Hls = 1
+}