manager: migrate base project structure & deps

ModpackUpdater.Apps.Manager/Ui/UpdatesCollectorWindow.axaml

@@ -0,0 +1,10 @@
+<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="800" d:DesignHeight="450"
+        Width="800" Height="500"
+        x:Class="ModpackUpdater.Apps.Manager.Ui.UpdatesCollectorWindow"
+        Title="UpdatesCollectorWindow">
+    
+</Window>