How to add a column for items on the right side of a TreeView?

Question

WPF

Good afternoon! There is a TreeView, it has buttons, I want to make all these buttons be in one column, one below the other, on the right side of the TreeView, how can this be done?
Something like this:

Current code:

<ScrollViewer Grid.ColumnSpan="3" Grid.Row="1" x:Name="scroll">
        <TreeView x:Name="tree" Margin="0,0,0,0" MaxWidth="{Binding ActualWidth, ElementName=scroll}">

            <TreeView.ItemContainerStyle>
                <Style TargetType="{x:Type TreeViewItem}">
                    <Setter Property="IsExpanded" Value="True" />
                </Style>
            </TreeView.ItemContainerStyle>
            <TreeView.Resources>
                <HierarchicalDataTemplate DataType="{x:Type app_for_portfolio:Folder}" ItemsSource="{Binding Items}">
                    <Grid MaxWidth="{Binding ActualWidth, ElementName=tree}">
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition Width="100"></ColumnDefinition>
                            <ColumnDefinition Width="Auto"></ColumnDefinition>
                            <ColumnDefinition Width="Auto"></ColumnDefinition>
                            <ColumnDefinition Width="Auto"></ColumnDefinition>
                            <ColumnDefinition Width="Auto"></ColumnDefinition>
                            <ColumnDefinition Width="Auto"></ColumnDefinition>
                        </Grid.ColumnDefinitions>
                        <TextBlock Text="{Binding Text}" HorizontalAlignment="Stretch" VerticalAlignment="Center" Grid.Column="0"/>
                        <TextBlock Text="{Binding LastResult}" HorizontalAlignment="Right" VerticalAlignment="Center"  Grid.Column="1"/>
                        <TextBlock Text="{Binding LastTimer}" Margin="5,0,0,0" HorizontalAlignment="Right" VerticalAlignment="Center"  Grid.Column="2"/>
                        <Button Content="Start Timer" Margin="5,0,0,0" HorizontalAlignment="Right"  VerticalAlignment="Center"  Grid.Column="3"/>
                        <Button Content="Scan" HorizontalAlignment="Right"  VerticalAlignment="Center"  Grid.Column="4"/>
                        <Button Content="Report" Margin="0,0,0,0" HorizontalAlignment="Right"  VerticalAlignment="Center"  Grid.Column="5"/>
                    </Grid>
                </HierarchicalDataTemplate>
                <DataTemplate DataType="{x:Type app_for_portfolio:Item}">
                    <TextBlock Text="{Binding Text}"/>
                </DataTemplate>
            </TreeView.Resources>
            <app_for_portfolio:Folder x:Name="maintree" Text="Main"/>
        </TreeView>
    </ScrollViewer>