move SheepIt settings to global settings

Views/GlobalSettingsWindow.axaml

@@ -0,0 +1,29 @@
+<Window xmlns="https://github.com/avaloniaui"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:vm="using:UnifiedFarmLauncher.ViewModels"
+        x:Class="UnifiedFarmLauncher.Views.GlobalSettingsWindow"
+        x:DataType="vm:GlobalSettingsViewModel"
+        Title="Global Settings"
+        Width="500" Height="300"
+        MinWidth="400" MinHeight="250">
+    <Grid RowDefinitions="Auto,*,Auto" Margin="10">
+        <!-- Settings Content -->
+        <TabControl Grid.Row="1" Margin="0,10">
+            <TabItem Header="SheepIt">
+                <StackPanel Margin="10" Spacing="10">
+                    <TextBlock Text="Username:"/>
+                    <TextBox Name="SheepItUsernameTextBox" Text="{Binding SheepItUsername}"/>
+                    
+                    <TextBlock Text="Render Key:" Margin="0,10,0,0"/>
+                    <TextBox Name="SheepItRenderKeyTextBox" Text="{Binding SheepItRenderKey}" PasswordChar="*"/>
+                </StackPanel>
+            </TabItem>
+        </TabControl>
+
+        <!-- Buttons -->
+        <StackPanel Orientation="Horizontal" HorizontalAlignment="Right" Grid.Row="2" Spacing="10" Margin="0,10,0,0">
+            <Button Name="OkButton" Content="OK" Width="80" IsDefault="True"/>
+            <Button Name="CancelButton" Content="Cancel" Width="80" IsCancel="True"/>
+        </StackPanel>
+    </Grid>
+</Window>