Refactor render graph error handling and resource APIs

- RenderGraph.Compile/Execute now return Error for better failure detection; error handling is propagated throughout compiler and executor.
- Renamed ScheduleReleaseResource to ReleaseResource for clarity; updated all usages.
- ResourceManager now calls ReleaseResource directly on Mesh, Material, and Shader types.
- Camera exposes Actual/Virtual size properties and Render returns Error.
- RenderingContext now uses IResourceManager for mesh/resource ops.
- Replaced custom BinaryWriter with BufferWriter in RenderGraphHasher.
- Improved variable naming, interface signatures, and code formatting.
- Added Error extension for IsSuccess/IsFailure.
- Minor FMOD/native interop and test code cleanups.
- No breaking API changes except for new Error return values on some methods.

src/Editor/Ghost.Editor/View/Controls/Hierarchy.xaml.cs

@@ -1,17 +1,4 @@
-using Microsoft.UI.Xaml;
 using Microsoft.UI.Xaml.Controls;
-using Microsoft.UI.Xaml.Controls.Primitives;
-using Microsoft.UI.Xaml.Data;
-using Microsoft.UI.Xaml.Input;
-using Microsoft.UI.Xaml.Media;
-using Microsoft.UI.Xaml.Navigation;
-using System;
-using System.Collections.Generic;
-using System.IO;
-using System.Linq;
-using System.Runtime.InteropServices.WindowsRuntime;
-using Windows.Foundation;
-using Windows.Foundation.Collections;
 
 // To learn more about WinUI, the WinUI project structure,
 // and more about our project templates, see: http://aka.ms/winui-project-info.

src/Editor/Ghost.Editor/View/Controls/ProjectBrowser.Menu.cs

@@ -31,7 +31,7 @@ internal partial class ProjectBrowser
         {
             return;
         }
-        
+
         var currentDir = viewModel.CurrentDirectoryPath;
         if (!Directory.Exists(currentDir))
         {

src/Editor/Ghost.Editor/View/Windows/EngineEditorWindow.xaml.cs

@@ -2,7 +2,6 @@ using Ghost.Editor.Core;
 using Ghost.Editor.Core.Contracts;
 using Ghost.Editor.Core.Services;
 using Ghost.Editor.ViewModels.Windows;
-using System.Diagnostics;
 using Windows.ApplicationModel;
 using WinUIEx;