Refactor project from Ghost.App to Ghost.Editor

Changed the project structure to reflect a shift from `Ghost.App` to `Ghost.Editor`, updating namespaces and class names throughout.

Changed the application class in `App.xaml` and `App.xaml.cs` from `GhostApplication` to `EditorApplication`.

Changed several service interfaces to reside under `Ghost.Editor.Services.Contracts`, including `IInspectorService`, `INotificationService`, and `IProgressService`.

Added `InspectorView` and `InspectorViewModel` classes to manage inspector functionality.

Added `NavigationTabView` and `NavigationTabPage` classes to facilitate navigation within the editor.

Enhanced `WorldNode` and `EntityNode` classes to support scene graph functionality, including serialization and entity management.

Updated the project file `Ghost.Editor.csproj` to reflect the new structure and removed old references.

Modified the solution file `GhostEngine.sln` to remove references to `Ghost.App` and include `Ghost.Editor`.

Updated unit tests to align with the new namespaces and project structure.

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

@@ -1,11 +1,11 @@
 using CommunityToolkit.Mvvm.ComponentModel;
-using Ghost.Editor.SceneGraph;
-using System;
+using Ghost.Editor.Contracts;
+using Ghost.Editor.Core.SceneGraph;
 using System.Collections.ObjectModel;
 
 namespace Ghost.Editor.ViewModels.Pages.EngineEditor;
 
-internal partial class HierarchyViewModel : ObservableObject, IDisposable
+internal partial class HierarchyViewModel : ObservableObject, INavigationAware
 {
     [ObservableProperty]
     public partial ObservableCollection<WorldNode> SceneList
@@ -14,12 +14,6 @@ internal partial class HierarchyViewModel : ObservableObject, IDisposable
         private set;
     } = new(EditorWorldManager.LoadedWorlds);
 
-    public HierarchyViewModel()
-    {
-        EditorWorldManager.OnWorldLoaded += OnWorldLoaded;
-        EditorWorldManager.OnWorldUnloaded += OnWorldUnloaded;
-    }
-
     private void OnWorldLoaded(WorldNode node)
     {
         SceneList.Add(node);
@@ -30,7 +24,13 @@ internal partial class HierarchyViewModel : ObservableObject, IDisposable
         SceneList.Remove(node);
     }
 
-    public void Dispose()
+    public void OnNavigatedTo(object? parameter)
+    {
+        EditorWorldManager.OnWorldLoaded += OnWorldLoaded;
+        EditorWorldManager.OnWorldUnloaded += OnWorldUnloaded;
+    }
+
+    public void OnNavigatedFrom()
     {
         EditorWorldManager.OnWorldLoaded -= OnWorldLoaded;
         EditorWorldManager.OnWorldUnloaded -= OnWorldUnloaded;

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

@@ -0,0 +1,32 @@
+using CommunityToolkit.Mvvm.ComponentModel;
+using Ghost.Editor.Contracts;
+using Ghost.Editor.Services.Contracts;
+
+namespace Ghost.Editor.ViewModels.Pages.EngineEditor;
+
+internal partial class InspectorViewModel(IInspectorService inspectorService) : ObservableObject, INavigationAware
+{
+    [ObservableProperty]
+    public partial IInspectable? Inspectable
+    {
+        get;
+        set;
+    }
+
+    public void OnNavigatedTo(object? parameter)
+    {
+        inspectorService.OnSelectionChanged += OnSelectionChanged;
+        Inspectable = inspectorService.SelectedInspectable;
+    }
+
+    public void OnNavigatedFrom()
+    {
+        inspectorService.OnSelectionChanged -= OnSelectionChanged;
+        Inspectable = null;
+    }
+
+    private void OnSelectionChanged()
+    {
+        Inspectable = inspectorService.SelectedInspectable;
+    }
+}

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

@@ -1,13 +1,8 @@
 using CommunityToolkit.Mvvm.ComponentModel;
-using Ghost.App;
-using Ghost.App.Models;
 using Ghost.Data.Services;
-using Ghost.Editor.AssetHandle;
-using System;
-using System.Collections.Generic;
+using Ghost.Editor.Core.AssetHandle;
+using Ghost.Editor.Models;
 using System.Collections.ObjectModel;
-using System.IO;
-using System.Threading.Tasks;
 
 namespace Ghost.Editor.ViewModels.Pages.EngineEditor;
 
@@ -96,7 +91,7 @@ internal partial class ProjectViewModel : ObservableObject
 
     private void NavigateToDirectory(string? path)
     {
-        GhostApplication.Window?.DispatcherQueue.TryEnqueue(async () =>
+        EditorApplication.Window?.DispatcherQueue.TryEnqueue(async () =>
         {
             DirectoryAssets.Clear();
 
@@ -121,7 +116,7 @@ internal partial class ProjectViewModel : ObservableObject
         });
     }
 
-    public async Task OpenSelected()
+    public void OpenSelected()
     {
         if (SelectedAsset == null)
         {
@@ -134,7 +129,7 @@ internal partial class ProjectViewModel : ObservableObject
         }
         else
         {
-            await AssetDatabase.OpenAsset(SelectedAsset.FullName);
+            AssetDatabase.OpenAsset(SelectedAsset.FullName);
         }
     }