[QuickAccent]Theming support (#22446)

* Adding theme awereness

* Adding theming colors

* High contrast

* Downgrade ModernWPF package

* Adding ModernWPF and PowerToys.Common.UI to installer

* Removing unused file and MahApps

* Removed MahApps from installer string

* fix projects and setup

* removed PowerAccent

* addressed PR feedback

Co-authored-by: Davide <25966642+davidegiacometti@users.noreply.github.com>

src/modules/poweraccent/PowerAccent.UI/Themes/Light.xaml

@@ -0,0 +1,35 @@
+<ResourceDictionary
+    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:system="clr-namespace:System;assembly=System.Runtime">
+
+    <!--  Metadata  -->
+    <system:String x:Key="Theme.Name">Light.Accent1</system:String>
+    <system:String x:Key="Theme.Origin">PowerToysRun</system:String>
+    <system:String x:Key="Theme.DisplayName">Accent1 (Light)</system:String>
+    <system:String x:Key="Theme.BaseColorScheme">Light</system:String>
+    <system:String x:Key="Theme.ColorScheme">Accent1</system:String>
+    <Color x:Key="Theme.PrimaryAccentColor">White</Color>
+
+    <SolidColorBrush x:Key="SecondaryBackgroundBrush" Color="#FFEEEEEE" />
+    <SolidColorBrush
+        x:Key="PrimaryBackgroundBrush"
+        Opacity="0.25"
+        Color="#FFFFFFFF" />
+    <SolidColorBrush
+        x:Key="WindowBorderBrush"
+        Opacity="0.4"
+        Color="#FF757575" />
+    <SolidColorBrush
+        x:Key="DividerBorderBrush"
+        Opacity="0.0578"
+        Color="#FF000000" />
+    <SolidColorBrush
+        x:Key="PrimaryForegroundBrush"
+        Opacity="0.8956"
+        Color="#FF000000" />
+    <SolidColorBrush
+        x:Key="SecondaryForegroundBrush"
+        Opacity="0.6189"
+        Color="#FF000000" />
+</ResourceDictionary>