feat: Add main application views and structure

- Implemented CreateInstanceView for creating new instances.
- Added HostsView for managing SSH hosts with CRUD operations.
- Created InstancesView for displaying and managing instances.
- Developed LogsView for viewing operation logs.
- Introduced SecretsView for managing secrets associated with hosts.
- Established SettingsView for configuring application settings.
- Created MainWindow as the main application window with navigation.
- Added app manifest and configuration files for logging and settings.

OTSSignsOrchestrator.Desktop/Views/LogsView.axaml

@@ -0,0 +1,29 @@
+<UserControl xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:vm="using:OTSSignsOrchestrator.Desktop.ViewModels"
+             x:Class="OTSSignsOrchestrator.Desktop.Views.LogsView"
+             x:DataType="vm:LogsViewModel">
+
+    <DockPanel>
+        <StackPanel DockPanel.Dock="Top" Orientation="Horizontal" Spacing="8" Margin="0,0,0,12">
+            <Button Content="Refresh" Command="{Binding LoadLogsCommand}" />
+            <TextBlock Text="{Binding StatusMessage}" VerticalAlignment="Center"
+                       FontSize="12" Foreground="#a6adc8" Margin="8,0,0,0" />
+        </StackPanel>
+
+        <DataGrid ItemsSource="{Binding Logs}"
+                  AutoGenerateColumns="False"
+                  IsReadOnly="True"
+                  GridLinesVisibility="Horizontal"
+                  CanUserResizeColumns="True">
+            <DataGrid.Columns>
+                <DataGridTextColumn Header="Time" Binding="{Binding Timestamp, StringFormat='{}{0:g}'}" Width="150" />
+                <DataGridTextColumn Header="Operation" Binding="{Binding Operation}" Width="100" />
+                <DataGridTextColumn Header="Status" Binding="{Binding Status}" Width="80" />
+                <DataGridTextColumn Header="Instance" Binding="{Binding Instance.StackName}" Width="120" />
+                <DataGridTextColumn Header="Message" Binding="{Binding Message}" Width="*" />
+                <DataGridTextColumn Header="Duration" Binding="{Binding DurationMs, StringFormat='{}{0}ms'}" Width="80" />
+            </DataGrid.Columns>
+        </DataGrid>
+    </DockPanel>
+</UserControl>