Add option to use replaygain tags for audio (#10566)

* Add option to use replaygain tags for audio

* Change regex to be specific

* Use ffprobe for faster metadata grabs

* Change regex to .Match

MediaBrowser.Model/Configuration/LibraryOptions.cs

@@ -31,6 +31,8 @@ namespace MediaBrowser.Model.Configuration
 
         public bool EnableLUFSScan { get; set; }
 
+        public bool UseReplayGainTags { get; set; }
+
         public bool EnableChapterImageExtraction { get; set; }
 
         public bool ExtractChapterImagesDuringLibraryScan { get; set; }