replace v6 with experimental v7 code

src/MpvNet.Windows/WPF/Controls/HyperlinkEx.cs

@@ -0,0 +1,27 @@
+
+using System.Windows.Documents;
+using System.Windows.Navigation;
+
+using MpvNet.Help;
+
+// TODO: change namespace to MpvNet.Windows.WPF.Controls
+namespace MpvNet.Windows.WPF;
+
+public class HyperlinkEx : Hyperlink
+{
+    void HyperLinkEx_RequestNavigate(object sender, RequestNavigateEventArgs e)
+    {
+        ProcessHelp.ShellExecute(e.Uri.AbsoluteUri);
+    }
+
+    public void SetURL(string? url)
+    {
+        if (string.IsNullOrEmpty(url))
+            return;
+
+        NavigateUri = new Uri(url);
+        RequestNavigate += HyperLinkEx_RequestNavigate;
+        Inlines.Clear();
+        Inlines.Add(url);
+    }
+}