Add project files.

DroneTest.UI/MainWindow.xaml

@@ -0,0 +1,12 @@
+<Window x:Class="DroneTest.UI.MainWindow"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        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"
+        xmlns:local="clr-namespace:DroneTest.UI"
+        mc:Ignorable="d"
+        Title="MainWindow" Height="450" Width="800">
+    <Grid>
+        <TextBlock Text="Hello World" HorizontalAlignment="Center" VerticalAlignment="Center"/>
+    </Grid>
+</Window>