Linux input provider - Style fixes

Nodes - Added display value node
Nodes - Updated help link

src/Artemis.VisualScripting/Nodes/Static/DisplayValueNode.cs

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+using Artemis.Core;
+using Artemis.VisualScripting.Nodes.Static.Screens;
+
+namespace Artemis.VisualScripting.Nodes.Static;
+
+[Node("Display Value", "Displays an input value for testing purposes.", "Static", InputType = typeof(object))]
+public class DisplayValueNode : Node<string, DisplayValueNodeCustomViewModel>
+{
+    public DisplayValueNode() : base("Display Value", "Displays an input value for testing purposes.")
+    {
+        Input = CreateInputPin<object>();
+    }
+
+    public InputPin<object> Input { get; }
+
+    public override void Evaluate()
+    {
+    }
+}

src/Artemis.VisualScripting/Nodes/Static/Screens/DisplayValueNodeCustomView.axaml

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+<UserControl 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"
+             xmlns:screens="clr-namespace:Artemis.VisualScripting.Nodes.Static.Screens"
+             xmlns:skiaSharp="clr-namespace:SkiaSharp;assembly=SkiaSharp"
+             xmlns:core="clr-namespace:Artemis.Core;assembly=Artemis.Core"
+             xmlns:converters1="clr-namespace:Artemis.UI.Shared.Converters;assembly=Artemis.UI.Shared"
+             mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
+             x:Class="Artemis.VisualScripting.Nodes.Static.Screens.DisplayValueNodeCustomView"
+             x:DataType="screens:DisplayValueNodeCustomViewModel">
+    <UserControl.Resources>
+        <converters1:SKColorToStringConverter x:Key="SKColorToStringConverter" />
+        <converters1:SKColorToColorConverter x:Key="SKColorToColorConverter" />
+    </UserControl.Resources>
+    <ContentControl Content="{CompiledBinding CurrentValue}" VerticalContentAlignment="Center">
+        <ContentControl.DataTemplates>
+            <DataTemplate DataType="skiaSharp:SKColor">
+                <StackPanel Orientation="Horizontal" HorizontalAlignment="Right">
+                    <TextBlock x:Name="HexDisplay"
+                               Text="{CompiledBinding Converter={StaticResource SKColorToStringConverter}}"
+                               VerticalAlignment="Center"
+                               HorizontalAlignment="Stretch" 
+                               FontFamily="Consolas"/>
+                    <Border Margin="5 0 0 0"
+                            VerticalAlignment="Bottom"
+                            HorizontalAlignment="Right"
+                            BorderThickness="1"
+                            MinWidth="18"
+                            MinHeight="18"
+                            Background="{DynamicResource CheckerboardBrush}"
+                            BorderBrush="{DynamicResource ColorPickerButtonOutline}"
+                            CornerRadius="4"
+                            ClipToBounds="True">
+                        <Border CornerRadius="4">
+                            <Border.Background>
+                                <SolidColorBrush Color="{Binding Converter={StaticResource SKColorToColorConverter}}" />
+                            </Border.Background>
+                        </Border>
+                    </Border>
+                </StackPanel>
+            </DataTemplate>
+            <DataTemplate DataType="core:Numeric">
+                <TextBlock Text="{Binding}" FontFamily="Consolas"/>
+            </DataTemplate>
+            <DataTemplate>
+                <TextBlock Text="{Binding}" FontFamily="Consolas"/>
+            </DataTemplate>
+        </ContentControl.DataTemplates>
+    </ContentControl>
+</UserControl>

src/Artemis.VisualScripting/Nodes/Static/Screens/DisplayValueNodeCustomView.axaml.cs

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+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Markup.Xaml;
+using Avalonia.ReactiveUI;
+
+namespace Artemis.VisualScripting.Nodes.Static.Screens;
+
+public partial class DisplayValueNodeCustomView : ReactiveUserControl<DisplayValueNodeCustomViewModel>
+{
+    public DisplayValueNodeCustomView()
+    {
+        InitializeComponent();
+    }
+
+    private void InitializeComponent()
+    {
+        AvaloniaXamlLoader.Load(this);
+    }
+}

src/Artemis.VisualScripting/Nodes/Static/Screens/DisplayValueNodeCustomViewModel.cs

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+using System.Reactive.Disposables;
+using Artemis.Core;
+using Artemis.UI.Shared.VisualScripting;
+using Avalonia.Threading;
+using ReactiveUI;
+
+namespace Artemis.VisualScripting.Nodes.Static.Screens;
+
+public class DisplayValueNodeCustomViewModel : CustomNodeViewModel
+{
+    private readonly DisplayValueNode _node;
+    private object? _currentValue;
+
+    public DisplayValueNodeCustomViewModel(DisplayValueNode node, INodeScript script) : base(node, script)
+    {
+        _node = node;
+
+        // Because the DisplayValueNode has no output it never evaluates, manually do so here
+        this.WhenActivated(d =>
+        {
+            DispatcherTimer updateTimer = new(TimeSpan.FromMilliseconds(25.0 / 1000), DispatcherPriority.Normal, Update);
+            updateTimer.Start();
+            Disposable.Create(() => updateTimer.Stop()).DisposeWith(d);
+        });
+    }
+
+    public object? CurrentValue
+    {
+        get => _currentValue;
+        private set => this.RaiseAndSetIfChanged(ref _currentValue, value);
+    }
+
+    private void Update(object? sender, EventArgs e)
+    {
+        CurrentValue = _node.Input.Value;
+    }
+}