Refactor project structure and improve performance

Changed the `ProjectRepository` class to be static for easier usage.
Changed `ProjectService` constants to public properties for accessibility.
Changed `App.xaml` to consolidate theme resources into `Override.xaml`.
Changed `App.xaml.cs` to implement an `AppStateMachine` for better state management.
Changed `ConsolePage` and `HierarchyPage` to utilize the new ViewModel structure.
Changed `ProjectPage` to use the `ExplorerItem` model for asset display.
Changed `Entity` and `EntityManager` to enhance component management with a new `IComponentData` interface.
Changed the `Logger` class to introduce structured logging functionality.
Changed the system architecture to support dependency management for better organization.
Changed the `QueryEnumerable` class to allow for more flexible entity queries.
Changed the `TypeHandle` class to improve efficiency in retrieving type handles.
Changed the `World` class to support robust world management and multiple worlds.
Updated the `Test` class to demonstrate the new entity and component management system.

Ghost.Editor/View/Pages/Landing/OpenProjectPage.xaml.cs

@@ -1,68 +1,47 @@
 using Ghost.Data.Models;
-using Ghost.Data.Services;
-using Ghost.Editor.AppStates;
-using Ghost.Editor.Services;
+using Ghost.Editor.ViewModels.Pages.Landing;
 using Microsoft.UI.Xaml;
 using Microsoft.UI.Xaml.Controls;
 using Microsoft.UI.Xaml.Navigation;
-using System;
-using System.Collections.ObjectModel;
-using System.Linq;
 using Windows.ApplicationModel.DataTransfer;
-using Windows.Storage;
 
 namespace Ghost.Editor.View.Pages.Landing;
 
 internal sealed partial class OpenProjectPage : Page
 {
-    private readonly ProjectService _projectService;
-    private readonly StackedNotificationService _notificationService;
-    private readonly AppStateService _stateService;
-
-    public readonly ObservableCollection<ProjectMetadataInfo> projects = new();
+    public OpenProjectViewModel ViewModel
+    {
+        get;
+    }
 
     public OpenProjectPage()
     {
-        _notificationService = App.GetService<StackedNotificationService>();
-        _projectService = App.GetService<ProjectService>();
-        _stateService = App.GetService<AppStateService>();
+        ViewModel = App.GetService<OpenProjectViewModel>();
         InitializeComponent();
     }
 
-    private void UpdateEmptyPlaceHolderVisibility()
-    {
-        EmptyPlaceHolder.Visibility = projects.Count == 0 ? Visibility.Visible : Visibility.Collapsed;
-    }
-
-    protected override async void OnNavigatedTo(NavigationEventArgs e)
+    protected override void OnNavigatedTo(NavigationEventArgs e)
     {
         base.OnNavigatedTo(e);
+        ViewModel.OnNavigatedTo(e.Parameter);
+    }
 
-        projects.Clear();
-        await foreach (var projectInfo in _projectService.LoadAllProjectAsync())
-        {
-            var metadata = await ProjectService.LoadMetadataAsync(projectInfo.MetadataPath);
-            if (metadata == null)
-            {
-                continue;
-            }
-
-            projects.Add(new(projectInfo.MetadataPath, metadata));
-        }
-
-        UpdateEmptyPlaceHolderVisibility();
+    override protected void OnNavigatedFrom(NavigationEventArgs e)
+    {
+        base.OnNavigatedFrom(e);
+        ViewModel.OnNavigatedFrom();
     }
 
     private void ProjectContainer_DragEnter(object sender, DragEventArgs e)
     {
-        DragVisual.Visibility = Visibility.Visible;
-        EmptyPlaceHolder.Visibility = Visibility.Collapsed;
+        ViewModel.DragVisibility = Visibility.Visible;
+        ViewModel.EmptyVisibility = Visibility.Collapsed;
     }
 
     private void ProjectContainer_DragLeave(object sender, DragEventArgs e)
     {
-        DragVisual.Visibility = Visibility.Collapsed;
-        UpdateEmptyPlaceHolderVisibility();
+        ViewModel.DragVisibility = Visibility.Collapsed;
+        ViewModel.UpdateEmptyPlaceHolderVisibility();
     }
 
     private void ProjectContainer_DragOver(object sender, DragEventArgs e)
@@ -79,55 +58,14 @@ internal sealed partial class OpenProjectPage : Page
 
     private async void ProjectContainer_Drop(object sender, DragEventArgs e)
     {
-        var errorMessage = string.Empty;
-        if (e.DataView.Contains(StandardDataFormats.StorageItems))
-        {
-            var items = await e.DataView.GetStorageItemsAsync();
-            var rootFolder = items.OfType<StorageFolder>().FirstOrDefault();
-            if (rootFolder != null)
-            {
-                var result = await _projectService.AddProjectFromDirectoryAsync(rootFolder.Path);
-                if (result.success)
-                {
-                    projects.Add(result.data);
-                    DragVisual.Visibility = Visibility.Collapsed;
-                    goto CloseDropPanel;
-                }
-                else
-                {
-                    errorMessage = result.message;
-                }
-            }
-        }
-        else
-        {
-            errorMessage = "Unsupported data format. Please drop a folder containing a project.";
-        }
-
-        _notificationService.ShowNotification(errorMessage, InfoBarSeverity.Error);
-
-    CloseDropPanel:
-        DragVisual.Visibility = Visibility.Collapsed;
-        UpdateEmptyPlaceHolderVisibility();
+        await ViewModel.ContentDrop(e.DataView);
     }
 
     private async void ListView_ItemClick(object sender, ItemClickEventArgs e)
     {
-        if (e.ClickedItem is not ProjectMetadataInfo project)
+        if (e.ClickedItem is ProjectMetadataInfo project)
         {
-            return;
-        }
-
-        try
-        {
-            project.Metadata.LastOpened = DateTime.Now;
-            await ProjectService.CreateMetadataFileAsync(project.Path, project.Metadata);
-
-            await _stateService.TransitionToAsync(StateKey.EngineEditor, project.Metadata);
-        }
-        catch (Exception exp)
-        {
-            _notificationService.ShowNotification($"Failed to load project: {exp.Message}", InfoBarSeverity.Error);
+            await ViewModel.LoadProject(project);
         }
     }
 }