Refactor project structure and enhance functionality

Changed the project namespace from `Ghost.Editor` to `Ghost.App` across multiple files.
Changed the `InternalsVisibleTo` attribute in `AssemblyInfo.cs` to include `Ghost.App`.
Changed the `ProjectRepository` class to add new asynchronous methods for retrieving projects by ID, name, and metadata path.
Changed the `ProjectService` class to utilize the new asynchronous project loading methods.
Changed the `SceneGraph` classes to improve node management and serialization.
Changed the `EntityManager` class to enhance entity management with new component handling methods.
Added new test classes, `EntityTest` and `SerializationTest`, to ensure reliability in entity and serialization systems.
Added the `Ghost.App` project file to establish a modular project structure.
Added the `Ghost.Generator` project for automated component serialization code generation.
Updated UI components to reflect the new namespace for proper functionality.

Ghost.Engine/Utilities/MatrixUtilities.cs

@@ -0,0 +1,20 @@
+using System.Numerics;
+using System.Runtime.CompilerServices;
+
+namespace Ghost.Engine.Utilities;
+
+public static class MatrixUtilities
+{
+    /// <summary>
+    /// Generates a transformation matrix from position, rotation, and scale vectors.
+    /// </summary>
+    /// <param name="position">Defines the translation component of the transformation matrix.</param>
+    /// <param name="rotation">Specifies the orientation of the object in 3D space.</param>
+    /// <param name="scale">Determines the size of the object along each axis.</param>
+    /// <returns>Returns a transformation matrix that combines the specified position, rotation, and scale.</returns>
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public static Matrix4x4 CreateTRS(Vector3 position, Quaternion rotation, Vector3 scale)
+    {
+        return Matrix4x4.CreateScale(scale) * Matrix4x4.CreateFromQuaternion(rotation) * Matrix4x4.CreateTranslation(position);
+    }
+}