Feature: Added a new theme for fake mica (#10716)

Author: yaira2

src/Files.App/Assets/Themes/MicaBlurDark.jpg

@@ -69,6 +69,13 @@
     </Content>
     <Content Remove="Assets\FilesHome.png" />
   </ItemGroup>
+  <ItemGroup>
+    <None Remove="Themes\Fake Mica" />
+    <None Remove="Themes\Fake Mica.xaml" />
+  </ItemGroup>
+  <ItemGroup>
+    <Page Remove="Themes\Fake Mica.xaml" />
+  </ItemGroup>
   <ItemGroup>
     <PackageReference Include="ByteSize" Version="2.1.1" />
     <PackageReference Include="CommunityToolkit.Mvvm" Version="8.0.0" />

src/Files.App/Assets/Themes/MicaBlurLight.jpg

@@ -0,0 +1,20 @@
+<ResourceDictionary
+	xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+	xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+	xmlns:BelowWindows10version1809="http://schemas.microsoft.com/winfx/2006/xaml/presentation?IsApiContractNotPresent(Windows.Foundation.UniversalApiContract, 7)"
+	xmlns:Windows10version1809="http://schemas.microsoft.com/winfx/2006/xaml/presentation?IsApiContractPresent(Windows.Foundation.UniversalApiContract, 7)">
+	<ResourceDictionary.ThemeDictionaries>
+		<ResourceDictionary x:Key="Default">
+			<ImageBrush
+				x:Key="RootBackgroundBrush"
+				ImageSource="\Assets\Themes\MicaBlurDark.jpg"
+				Stretch="UniformToFill" />
+		</ResourceDictionary>
+		<ResourceDictionary x:Key="Light">
+			<ImageBrush
+				x:Key="RootBackgroundBrush"
+				ImageSource="\Assets\Themes\MicaBlurLight.jpg"
+				Stretch="UniformToFill" />
+		</ResourceDictionary>
+	</ResourceDictionary.ThemeDictionaries>
+</ResourceDictionary>