Added UI app.

MangaReader.WinUI/Resources/Styles.xaml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ResourceDictionary
+    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:Media="using:CommunityToolkit.WinUI.Media">
+
+    <Style TargetType="TextBlock">
+        <Setter Property="FontFamily" Value="{StaticResource PoppinsRegular}" />
+    </Style>
+
+    <Media:AttachedCardShadow x:Key="CommonShadow" Offset="5" BlurRadius="10" Opacity=".4" />
+
+</ResourceDictionary>