replace v6 with experimental v7 code

src/MpvNet.Windows/UI/CommandPaletteItem.cs

@@ -0,0 +1,25 @@
+
+namespace MpvNet.Windows.UI;
+
+public class CommandPaletteItem
+{
+    public CommandPaletteItem() { }
+
+    public CommandPaletteItem(string text, Action action)
+    {
+        Text = text;
+        Action = action;
+    }
+
+    public CommandPaletteItem(string text, string secondaryText, Action action)
+    {
+        Text = text;
+        Action = action;
+        SecondaryText = secondaryText;
+    }
+
+    public string Text { get; set; } = "";
+    public string SecondaryText { get; set; } = "";
+    public Action? Action { get; set; }
+    public Binding? Binding { get; set; }
+}