[Run] Switch to WPF UI theme manager (#30520)

* Switch to WPF UI theme manager

* fix

* add theme manager

* fix

* fix

* update error icon

* moved image initialization

* cleanup

src/modules/launcher/PowerLauncher/Helper/ThemeExtensions.cs

@@ -0,0 +1,46 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System.Linq;
+using ManagedCommon;
+using Microsoft.Win32;
+using Wpf.Ui.Appearance;
+
+namespace PowerLauncher.Helper
+{
+    public static class ThemeExtensions
+    {
+        public static Theme ToTheme(this ApplicationTheme applicationTheme)
+        {
+            return applicationTheme switch
+            {
+                ApplicationTheme.Dark => Theme.Dark,
+                ApplicationTheme.Light => Theme.Light,
+                ApplicationTheme.HighContrast => GetHighContrastBaseType(),
+                _ => Theme.Light,
+            };
+        }
+
+        private static Theme GetHighContrastBaseType()
+        {
+            string registryKey = @"HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Themes";
+            string theme = (string)Registry.GetValue(registryKey, "CurrentTheme", string.Empty);
+            theme = theme.Split('\\').Last().Split('.').First().ToString();
+
+            switch (theme)
+            {
+                case "hc1":
+                    return Theme.HighContrastOne;
+                case "hc2":
+                    return Theme.HighContrastTwo;
+                case "hcwhite":
+                    return Theme.HighContrastWhite;
+                case "hcblack":
+                    return Theme.HighContrastBlack;
+                default:
+                    return Theme.HighContrastOne;
+            }
+        }
+    }
+}