Updater added

Updater/MainWindow.axaml

@@ -0,0 +1,12 @@
+<Window xmlns="https://github.com/avaloniaui"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+        mc:Ignorable="d" d:DesignWidth="250" d:DesignHeight="50"
+        x:Class="Updater.MainWindow"
+        Title="Updater">
+	<StackPanel Margin="0">
+		<Label Content="Updating ... "/>
+		<ProgressBar x:Class="Updater.MainWindow" x:Name="progressBar1" IsIndeterminate="True" />
+	</StackPanel>
+</Window>