Refactor application structure and add unit tests

Added:
- New `ProgressService` class for managing progress indicators.
- New `AssetDatabase`, `AssetOpenHandlerAttribute`, and `AsyncAssetOpenHandlerAttribute` classes for asset handling.
- `Ghost.UnitTest` project for unit testing with associated files and configurations.

Changed:
- `ActivationHandler` class to ensure correct handling of `LaunchActivatedEventArgs`.
- `App.xaml.cs` to register `INotificationService` and `IProgressService`, replacing `StackedNotificationService`.
- `OnLaunched` method in `App.xaml.cs` to correctly call `ActivationHandler.Handle(args)` and start the host.
- `INavigationAware` interface from internal to public for broader access.
- `EditorState.cs` to activate `EditorApplication` with the current service provider.
- Property names in `AssetItem` and `ExplorerItem` structs to `Name` and `FullName`.
- `NotificationService` class to implement `INotificationService` and refactor notification handling.
- `AssetPathToGlyphConverter` to handle file extensions consistently.
- Bindings in `ProjectPage.xaml` and `ProjectPage.xaml.cs` to use `FullName` instead of `Path`.
- `EngineEditorWindow` and `LandingWindow` classes to utilize new notification and progress services.
- `Logger` class to include a new method for logging errors with exceptions.

Updated:
- Manifest files and project files to reflect new structure and dependencies.
- Solution file `GhostEngine.sln` to include the new unit test project.
- Added several new test classes and methods in `UnitTests.cs`.

Ghost.App/ViewModels/Pages/EngineEditor/ConsoleViewModel.cs

@@ -0,0 +1,92 @@
+using CommunityToolkit.Mvvm.ComponentModel;
+using CommunityToolkit.Mvvm.Input;
+using Ghost.Engine.Models;
+using Ghost.Engine.Services;
+using System.Collections.ObjectModel;
+
+namespace Ghost.Editor.ViewModels.Pages.EngineEditor;
+
+internal partial class ConsoleViewModel : ObservableObject
+{
+    [ObservableProperty]
+    public partial ObservableCollection<LogMessage> Logs
+    {
+        get; set;
+    } = new();
+
+    [ObservableProperty]
+    public partial bool ShowInfo
+    {
+        get; set;
+    } = true;
+
+    [ObservableProperty]
+    public partial bool ShowWarning
+    {
+        get; set;
+    } = true;
+
+    [ObservableProperty]
+    public partial bool ShowError
+    {
+        get; set;
+    } = true;
+
+    [ObservableProperty]
+    public partial bool ShowStackTrace
+    {
+        get; set;
+    } = false;
+
+    [ObservableProperty]
+    public partial LogMessage? SelectedLog
+    {
+        get; set;
+    }
+
+    public ConsoleViewModel()
+    {
+        foreach (var log in Logger.Logs)
+        {
+            Logs.Add(log);
+        }
+
+        Logger.OnLogsUpdate += UpdateLogs;
+    }
+
+    ~ConsoleViewModel()
+    {
+        Logger.OnLogsUpdate -= UpdateLogs;
+    }
+
+    private void UpdateLogs(LogChangeType updateType)
+    {
+        switch (updateType)
+        {
+            case LogChangeType.LogAdded:
+                Logs.Add(Logger.Logs[^1]);
+                break;
+            case LogChangeType.LogRemoved:
+                if (Logs.Count > 0)
+                {
+                    Logs.RemoveAt(0);
+                }
+                break;
+            case LogChangeType.LogsCleared:
+                Logs.Clear();
+                break;
+        }
+    }
+
+    partial void OnShowStackTraceChanged(bool value)
+    {
+        Logger.HasStackTrace = value;
+        Logger.LogInfo($"Stack trace visibility set to {value}.");
+    }
+
+    [RelayCommand]
+    private void ClearLogs()
+    {
+        Logger.Clear();
+    }
+}