fixed runtime xaml load failure

src/core/Microsoft.PowerToys.Settings.UI.Runner/Program.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace SettingsRunner
+{
+    public class Program
+    {
+        [System.STAThreadAttribute()]
+        public static void Main()
+        {
+            using (new SettingsUI.App())
+            {
+                SettingsRunner.App app = new SettingsRunner.App();
+                app.InitializeComponent();
+                app.Run();
+            }
+        }
+    }
+}