[file:] added new window for splash screen

StartupWindow.axaml

@@ -0,0 +1,18 @@
+<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" Width="800" MinWidth="800" MaxWidth="800" d:DesignHeight="150"
+        Height="150" MinHeight="150" MaxHeight="150" Icon="assets/icon.ico"
+        x:Class="Logof_Client.StartupWindow" Title="Verarbeitung läuft...">
+    <Grid>
+        <!-- <ScrollViewer x:Name="ScvLog"> -->
+        <!--     <TextBlock x:Name="TbLog" Margin="10,10,10,50" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" -->
+        <!--                FontFamily="Consolas" /> -->
+        <!-- </ScrollViewer> -->
+        <TextBlock x:Name="TbLog" Margin="10,10,10,50" HorizontalAlignment="Stretch" VerticalAlignment="Stretch"
+                   FontFamily="Consolas" />
+        <ProgressBar x:Name="PbProgress" HorizontalAlignment="Stretch" Height="30" VerticalAlignment="Bottom"
+                     Margin="10,0,10,10" />
+    </Grid>
+</Window>

StartupWindow.axaml.cs

@@ -0,0 +1,13 @@
+using Avalonia.Controls;
+
+namespace Logof_Client;
+
+public partial class StartupWindow : Window
+{
+    public StartupWindow()
+    {
+        InitializeComponent();
+    }
+
+
+}