Terminal: measure characters with Unicode 11 widths, so an emoji takes the two columns the remote counts

src/DodoSSH.Client.Shell/Terminal/AvaloniaTerminalAssetProvider.cs

@@ -24,6 +24,7 @@ internal sealed class AvaloniaTerminalAssetProvider : ITerminalAssetProvider
         ("/vendor/xterm.css", "vendor/xterm.css", "text/css; charset=utf-8"),
         ("/vendor/addon-fit.js", "vendor/addon-fit.js", "text/javascript; charset=utf-8"),
         ("/vendor/addon-webgl.js", "vendor/addon-webgl.js", "text/javascript; charset=utf-8"),
+        ("/vendor/addon-unicode11.js", "vendor/addon-unicode11.js", "text/javascript; charset=utf-8"),
     ];
 
     private readonly Dictionary<string, TerminalAsset> assets = new(StringComparer.Ordinal);