add macos arm64 support

add macos arm64 support,libvlc version is 3.0.21

src/LibVLCSharp/Shared/Core/Core.cs

@@ -130,6 +130,12 @@ namespace LibVLCSharp.Shared
 
         static void LoadLibVLC(string? libvlcDirectoryPath = null)
         {
+            if (PlatformHelper.IsMac && RuntimeInformation.RuntimeIdentifier == "osx-arm64" &&
+                string.IsNullOrEmpty(libvlcDirectoryPath))
+            {
+                libvlcDirectoryPath = Path.Combine(AppContext.BaseDirectory, "vlcLib");
+            }
+
             // full path to directory location of libvlc and libvlccore has been provided
             if (!string.IsNullOrEmpty(libvlcDirectoryPath))
             {