Workshop - Added library view models

src/Artemis.UI/Screens/Workshop/Library/Tabs/LibraryInstalledView.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"
+             mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
+             x:Class="Artemis.UI.Screens.Workshop.Library.Tabs.LibraryInstalledView">
+    Installed entries management here 🫡
+</UserControl>

src/Artemis.UI/Screens/Workshop/Library/Tabs/LibraryInstalledView.axaml.cs

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+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Markup.Xaml;
+using Avalonia.ReactiveUI;
+
+namespace Artemis.UI.Screens.Workshop.Library.Tabs;
+
+public partial class LibraryInstalledView : ReactiveUserControl<LibraryInstalledViewModel>
+{
+    public LibraryInstalledView()
+    {
+        InitializeComponent();
+    }
+}

src/Artemis.UI/Screens/Workshop/Library/Tabs/LibraryInstalledViewModel.cs

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+using Artemis.UI.Shared;
+
+namespace Artemis.UI.Screens.Workshop.Library.Tabs;
+
+public class LibraryInstalledViewModel : ActivatableViewModelBase
+{
+    
+}

src/Artemis.UI/Screens/Workshop/Library/Tabs/LibrarySubmissionsView.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"
+             mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
+             x:Class="Artemis.UI.Screens.Workshop.Library.Tabs.LibrarySubmissionsView">
+    Submission management here 😗
+</UserControl>

src/Artemis.UI/Screens/Workshop/Library/Tabs/LibrarySubmissionsView.axaml.cs

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+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Markup.Xaml;
+using Avalonia.ReactiveUI;
+
+namespace Artemis.UI.Screens.Workshop.Library.Tabs;
+
+public partial class LibrarySubmissionsView : ReactiveUserControl<LibrarySubmissionsViewModel>
+{
+    public LibrarySubmissionsView()
+    {
+        InitializeComponent();
+    }
+}

src/Artemis.UI/Screens/Workshop/Library/Tabs/LibrarySubmissionsViewModel.cs

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+using Artemis.UI.Shared;
+
+namespace Artemis.UI.Screens.Workshop.Library.Tabs;
+
+public class LibrarySubmissionsViewModel : ActivatableViewModelBase
+{
+    
+}

src/Artemis.UI/Screens/Workshop/Library/WorkshopLibraryVIew.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:ui="clr-namespace:FluentAvalonia.UI.Controls;assembly=FluentAvalonia"
+             xmlns:library="clr-namespace:Artemis.UI.Screens.Workshop.Library"
+             xmlns:routing="clr-namespace:Artemis.UI.Routing"
+             xmlns:ui1="clr-namespace:Artemis.UI"
+             mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
+             x:Class="Artemis.UI.Screens.Workshop.Library.WorkshopLibraryView"
+             x:DataType="library:WorkshopLibraryViewModel">
+    <ui:NavigationView PaneDisplayMode="Top" MenuItemsSource="{CompiledBinding Tabs}" SelectedItem="{CompiledBinding SelectedTab}">
+        <ui:NavigationView.Styles>
+            <Styles>
+                <Style Selector="ui|NavigationView:topnavminimal /template/ SplitView Border#ContentGridBorder">
+                    <Setter Property="CornerRadius" Value="8 0 0 0" />
+                </Style>
+            </Styles>
+        </ui:NavigationView.Styles>
+        
+        <ui:Frame Name="TabFrame" IsNavigationStackEnabled="False" CacheSize="0">
+            <ui:Frame.NavigationPageFactory>
+                <ui1:PageFactory/>
+            </ui:Frame.NavigationPageFactory>
+        </ui:Frame>
+    </ui:NavigationView>
+</UserControl>

src/Artemis.UI/Screens/Workshop/Library/WorkshopLibraryVIew.axaml.cs

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+using System;
+using System.Reactive.Disposables;
+using Artemis.UI.Shared;
+using Avalonia.ReactiveUI;
+using Avalonia.Threading;
+using FluentAvalonia.UI.Media.Animation;
+using FluentAvalonia.UI.Navigation;
+using ReactiveUI;
+
+namespace Artemis.UI.Screens.Workshop.Library;
+
+public partial class WorkshopLibraryView : ReactiveUserControl<WorkshopLibraryViewModel>
+{
+    private int _lastIndex;
+
+    public WorkshopLibraryView()
+    {
+        InitializeComponent();
+        this.WhenActivated(d => { ViewModel.WhenAnyValue(vm => vm.Screen).WhereNotNull().Subscribe(Navigate).DisposeWith(d); });
+    }
+
+    private void Navigate(ViewModelBase viewModel)
+    {
+        Dispatcher.UIThread.Invoke(() =>
+        {
+            if (ViewModel == null)
+                return;
+            
+            SlideNavigationTransitionInfo transitionInfo = new()
+            {
+                Effect = ViewModel.Tabs.IndexOf(ViewModel.SelectedTab) > _lastIndex ? SlideNavigationTransitionEffect.FromRight : SlideNavigationTransitionEffect.FromLeft
+            };
+            TabFrame.NavigateFromObject(viewModel, new FrameNavigationOptions {TransitionInfoOverride = transitionInfo});
+            _lastIndex = ViewModel.Tabs.IndexOf(ViewModel.SelectedTab);
+        });
+    }
+}

src/Artemis.UI/Screens/Workshop/Library/WorkshopLibraryViewModel.cs

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+using System.Collections.ObjectModel;
+using System.Linq;
+using System.Reactive.Disposables;
+using System.Threading;
+using System.Threading.Tasks;
+using Artemis.UI.Routing;
+using Artemis.UI.Shared;
+using Artemis.UI.Shared.Routing;
+using Artemis.WebClient.Workshop;
+using ReactiveUI;
+using System;
+
+namespace Artemis.UI.Screens.Workshop.Library;
+
+public class WorkshopLibraryViewModel : RoutableScreen<ActivatableViewModelBase>, IWorkshopViewModel
+{
+    private RouteViewModel? _selectedTab;
+
+    /// <inheritdoc />
+    public WorkshopLibraryViewModel(IRouter router)
+    {
+        Tabs = new ObservableCollection<RouteViewModel>
+        {
+            new("workshop/library/installed", "Installed"),
+            new("workshop/library/submissions", "Submissions")
+        };
+        
+        // Navigate on tab change
+        this.WhenActivated(d =>  this.WhenAnyValue(vm => vm.SelectedTab)
+            .WhereNotNull()
+            .Subscribe(s => router.Navigate(s.Path, new RouterNavigationOptions {IgnoreOnPartialMatch = true}))
+            .DisposeWith(d));
+    }
+
+    public EntryType? EntryType => null;
+    public ObservableCollection<RouteViewModel> Tabs { get; }
+
+    public RouteViewModel? SelectedTab
+    {
+        get => _selectedTab;
+        set => RaiseAndSetIfChanged(ref _selectedTab, value);
+    }
+
+    public override async Task OnNavigating(NavigationArguments args, CancellationToken cancellationToken)
+    {
+        SelectedTab = Tabs.FirstOrDefault(t => t.Matches(args.Path));
+        if (SelectedTab == null)
+            await args.Router.Navigate(Tabs.First().Path);
+    }
+}