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/AssemblyInfo.cs

@@ -1,3 +1,3 @@
 using System.Runtime.CompilerServices;
 
-[assembly: InternalsVisibleTo("Ghost.Editor")]
+[assembly: InternalsVisibleTo("Ghost.App")]

Ghost.Engine/Components/LocalToWorld.cs

@@ -1,4 +1,4 @@
-using Ghost.Engine.Helpers;
+using Ghost.Engine.Utilities;
 using Ghost.Entities.Components;
 using System.Numerics;
 using System.Runtime.CompilerServices;
@@ -15,7 +15,7 @@ public struct LocalToWorld : IComponentData
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         get => new()
         {
-            matrix = MatrixHelpers.CreateTRS(Vector3.Zero, Quaternion.Identity, Vector3.One)
+            matrix = MatrixUtilities.CreateTRS(Vector3.Zero, Quaternion.Identity, Vector3.One)
         };
     }
 }

Ghost.Engine/Ghost.Engine.csproj

@@ -17,6 +17,7 @@
 
   <ItemGroup>
     <ProjectReference Include="..\Ghost.Entities\Ghost.Entities.csproj" />
+    <!--<ProjectReference Include="..\Ghost.Generator\Ghost.Generator.csproj" OutputItemType="Analyzer" ReferenceOutputAssembly="false" />-->
   </ItemGroup>
 
 </Project>

Ghost.Engine/Utilities/MatrixUtilities.cs

@@ -1,9 +1,9 @@
 using System.Numerics;
 using System.Runtime.CompilerServices;
 
-namespace Ghost.Engine.Helpers;
+namespace Ghost.Engine.Utilities;
 
-public static class MatrixHelpers
+public static class MatrixUtilities
 {
     /// <summary>
     /// Generates a transformation matrix from position, rotation, and scale vectors.

Ghost.Engine/Utilities/Utf8JsonWriterExtensions.cs

@@ -0,0 +1,40 @@
+using System.Text.Json;
+
+namespace Ghost.Engine.Utilities;
+
+public static class Utf8JsonWriterExtensions
+{
+    public static void WriteArray<T>(this Utf8JsonWriter writer, ReadOnlySpan<char> name, IEnumerable<T> source, Action<T> writeAction)
+    {
+        writer.WriteStartArray(name);
+        foreach (var item in source)
+        {
+            writeAction(item);
+        }
+        writer.WriteEndArray();
+    }
+
+    public static void WriteArray<T>(this Utf8JsonWriter writer, ReadOnlySpan<char> name, ReadOnlySpan<T> source, Action<T> writeAction)
+    {
+        writer.WriteStartArray(name);
+        foreach (var item in source)
+        {
+            writeAction(item);
+        }
+        writer.WriteEndArray();
+    }
+
+    public static void WriteObject(this Utf8JsonWriter writer, Action writeAction)
+    {
+        writer.WriteStartObject();
+        writeAction();
+        writer.WriteEndObject();
+    }
+
+    public static void WriteObject(this Utf8JsonWriter writer, ReadOnlySpan<char> name, Action writeAction)
+    {
+        writer.WriteStartObject(name);
+        writeAction();
+        writer.WriteEndObject();
+    }
+}