[Launcher]Port from WPF-UI to .NET 9 WPF (#36215)

* Initial implementation

* Fix fluent style

* Fix no endline

* Update expect.txt

* Fix formatting

* Fix light theme looking bad on Windows 10

* fix formatting

* test change

* Now really fixed W10

* Add a comment

* Fix typos

* Fix spellcheck errors

* Fix spellcheck pattern for websites

* Change patterns for spellcheck in the right file

* Fix XAML styling

* Fix contrast colors on W11

* Fix formatting

* Removed emty line

* Fix formatting

* Added comment to fluentHC file

* fix comment

* Fix Windows10 again.
Adress feedback.

* W11 fix chaning from high contrast to normal not having correct background

* W10 Fix high contrast not working after switching from light/dark moed

* Address feedback

* Fix formatting

* Second W11 fix chaning from high contrast to normal not having correct background

src/modules/launcher/PowerLauncher/LauncherControl.xaml

@@ -6,7 +6,6 @@
     xmlns:local="clr-namespace:PowerLauncher"
     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
     xmlns:p="clr-namespace:PowerLauncher.Properties"
-    xmlns:ui="http://schemas.lepo.co/wpfui/2022/xaml"
     d:DesignHeight="300"
     d:DesignWidth="720"
     mc:Ignorable="d">
@@ -40,7 +39,7 @@
                                         <Setter Property="Foreground" Value="Transparent" />
                                         <Style.Triggers>
                                             <DataTrigger Binding="{Binding Path=Text, RelativeSource={RelativeSource TemplatedParent}}" Value="">
-                                                <Setter Property="Foreground" Value="{DynamicResource TextPlaceholderColorBrush}" />
+                                                <Setter Property="Foreground" Value="{DynamicResource TextControlPlaceholderForeground}" />
                                             </DataTrigger>
                                         </Style.Triggers>
                                     </Style>
@@ -115,11 +114,14 @@
             x:FieldModifier="public"
             Canvas.ZIndex="-1"
             FontSize="{DynamicResource TitleFontSize}"
-            Foreground="{DynamicResource TextPlaceholderColorBrush}" />
-        <ui:SymbolIcon
+            Foreground="{DynamicResource TextControlPlaceholderForeground}" />
+        <TextBlock
+            Grid.Column="0"
+            Margin="10,7,0,0"
             AutomationProperties.Name="{x:Static p:Resources.SearchIcon}"
+            FontFamily="Segoe Fluent Icons, Segoe MDL2 Assets"
             FontSize="20"
-            Foreground="{DynamicResource TextPlaceholderColorBrush}"
-            Symbol="Search12" />
+            Foreground="{DynamicResource TextControlPlaceholderForeground}"
+            Text="&#xE094;" />
     </Grid>
 </UserControl>