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.Engine/Components/Hierarchy.cs

@@ -0,0 +1,24 @@
+using Ghost.Entities;
+using Ghost.Entities.Components;
+using System.Runtime.CompilerServices;
+
+namespace Ghost.Engine.Components;
+
+[SkipLocalsInit]
+public struct Hierarchy : IComponentData
+{
+    public Entity parent;
+    public Entity firstChild;
+    public Entity nextSibling;
+
+    public static Hierarchy Root
+    {
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        get => new()
+        {
+            parent = Entity.Invalid,
+            firstChild = Entity.Invalid,
+            nextSibling = Entity.Invalid
+        };
+    }
+}

Ghost.Engine/Components/LocalToWorld.cs

@@ -0,0 +1,21 @@
+using Ghost.Engine.Helpers;
+using Ghost.Entities.Components;
+using System.Numerics;
+using System.Runtime.CompilerServices;
+
+namespace Ghost.Engine.Components;
+
+[SkipLocalsInit]
+public struct LocalToWorld : IComponentData
+{
+    public Matrix4x4 matrix;
+
+    public static LocalToWorld Identity
+    {
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        get => new()
+        {
+            matrix = MatrixHelpers.CreateTRS(Vector3.Zero, Quaternion.Identity, Vector3.One)
+        };
+    }
+}

Ghost.Engine/Components/Transform.cs

@@ -1,77 +0,0 @@
-using Ghost.Engine.Helpers;
-using Ghost.Entities;
-using System.Numerics;
-using System.Runtime.CompilerServices;
-
-namespace Ghost.Engine.Components;
-
-public struct Transform : IComponentData
-{
-    private Vector3 _position = Vector3.Zero;
-    public Vector3 Position
-    {
-        get => _position;
-        set
-        {
-            _position = value;
-            hasChanged = true;
-            UpdateMatrices();
-        }
-    }
-
-    private Quaternion _rotation = Quaternion.Identity;
-    public Quaternion Rotation
-    {
-        get => _rotation;
-        set
-        {
-            _rotation = value;
-            hasChanged = true;
-            UpdateMatrices();
-        }
-    }
-
-    private Vector3 _scale = Vector3.One;
-    public Vector3 Scale
-    {
-        get => _scale;
-        set
-        {
-            _scale = value;
-            hasChanged = true;
-            UpdateMatrices();
-        }
-    }
-
-    public bool hasChanged;
-
-    private Matrix4x4 _localToWorldMatrix;
-    private Matrix4x4 _worldToLocalMatrix;
-
-    public readonly Matrix4x4 LocalToWorldMatrix => _localToWorldMatrix;
-    public readonly Matrix4x4 WorldToLocalMatrix => _worldToLocalMatrix;
-
-    public static Transform Default
-    {
-        [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        get => new(Vector3.Zero, Quaternion.Identity, Vector3.One);
-    }
-
-    public Transform(Vector3 position, Quaternion rotation, Vector3 scale)
-    {
-        _position = position;
-        _rotation = rotation;
-        _scale = scale;
-        hasChanged = false;
-        _localToWorldMatrix = Matrix4x4.Identity;
-        _worldToLocalMatrix = Matrix4x4.Identity;
-
-        UpdateMatrices();
-    }
-
-    private void UpdateMatrices()
-    {
-        _localToWorldMatrix = MatrixHelpers.CreateTRS(_position, _rotation, _scale);
-        Matrix4x4.Invert(_localToWorldMatrix, out _worldToLocalMatrix);
-    }
-}

Ghost.Engine/EngineCore.cs

@@ -1,25 +1,16 @@
 using Ghost.Engine.Models;
+using Ghost.Engine.Services;
 
 namespace Ghost.Engine;
 
-internal class EngineCore
+internal class EngineCore : IDisposable, IAsyncDisposable
 {
-    public static EngineCore? Current
+    public async Task StartAsync(LaunchArgument args)
     {
-        get;
-        private set;
-    }
-
-    public static async Task StartAsync(LaunchArgument args)
-    {
-        if (Current != null)
-        {
-            return;
-        }
-
-        Current = new EngineCore();
-
         ActivationHandler.Handle(args);
+
+        Logger.LogInfo("Engine started successfully.");
+
         await Task.CompletedTask;
     }
 
@@ -27,4 +18,14 @@ internal class EngineCore
     {
         await Task.CompletedTask;
     }
+
+    public void Dispose()
+    {
+        ShutDownAsync().GetAwaiter().GetResult();
+    }
+
+    public async ValueTask DisposeAsync()
+    {
+        await ShutDownAsync();
+    }
 }

Ghost.Engine/Models/LogMessage.cs

@@ -0,0 +1,56 @@
+using System.Diagnostics;
+
+namespace Ghost.Engine.Models;
+
+public enum LogLevel
+{
+    Info,
+    Warning,
+    Error
+}
+
+internal class LogMessage
+{
+    public LogLevel Level
+    {
+        get; set;
+    }
+
+    public string Message
+    {
+        get; set;
+    }
+
+    public StackTrace? StackTrace
+    {
+        get; set;
+    }
+
+    public DateTime Timestamp
+    {
+        get; set;
+    }
+
+    public LogMessage(LogLevel level, string message, StackTrace? stackTrace = null)
+    {
+        Level = level;
+        Message = message;
+        StackTrace = stackTrace;
+        Timestamp = DateTime.Now;
+    }
+
+    public override string ToString()
+    {
+        return $"{Timestamp:HH:mm:ss} [{Level}] {Message}";
+    }
+
+    public string ToStringWithStackTrace()
+    {
+        if (StackTrace == null)
+        {
+            return ToString();
+        }
+
+        return $"{ToString()}\n{StackTrace}";
+    }
+}

Ghost.Engine/Services/Logger.cs

@@ -0,0 +1,73 @@
+using Ghost.Engine.Models;
+using System.Diagnostics;
+
+namespace Ghost.Engine.Services;
+
+internal enum LogChangeType
+{
+    LogAdded,
+    LogRemoved,
+    LogsCleared
+}
+
+public static class Logger
+{
+
+    private const int _MAX_LOGS = 4096;
+
+    private static readonly List<LogMessage> _logs = new();
+    internal static List<LogMessage> Logs => _logs;
+
+    internal static event Action<LogChangeType>? OnLogsUpdate;
+
+    internal static bool HasStackTrace
+    {
+        get; set;
+    }
+
+    private static void LogInternal(LogLevel level, string message, int skipFrame)
+    {
+        if (_logs.Count >= _MAX_LOGS)
+        {
+            _logs.RemoveAt(0);
+            OnLogsUpdate?.Invoke(LogChangeType.LogRemoved);
+        }
+
+        StackTrace? stackTrace = null;
+        if (HasStackTrace)
+        {
+            stackTrace = new StackTrace(skipFrame, true);
+        }
+
+        var logMessage = new LogMessage(level, message, stackTrace);
+        _logs.Add(logMessage);
+
+        OnLogsUpdate?.Invoke(LogChangeType.LogAdded);
+    }
+
+    public static void Log(LogLevel level, string message)
+    {
+        LogInternal(level, message, 2);
+    }
+
+    public static void LogInfo(string message)
+    {
+        LogInternal(LogLevel.Info, message, 3);
+    }
+
+    public static void LogWarning(string message)
+    {
+        LogInternal(LogLevel.Warning, message, 3);
+    }
+
+    public static void LogError(string message)
+    {
+        LogInternal(LogLevel.Error, message, 3);
+    }
+
+    internal static void Clear()
+    {
+        _logs.Clear();
+        OnLogsUpdate?.Invoke(LogChangeType.LogsCleared);
+    }
+}