Refactor GPU resource management and rendering pipeline

- Introduced `Handle<T>` and `Identifier<T>` for lightweight, strongly-typed resource identifiers.
- Replaced `BitSet` with `UnsafeBitSet` for improved performance and memory safety.
- Refactored `Mesh` and `Material` into `MeshClass` and `MaterialClass` for better GPU resource handling.
- Added `D3D12ResourceDatabase` to centralize GPU resource tracking and lifecycle management.
- Updated `D3D12ShaderCompiler` to load shaders from disk and dynamically populate constant buffers and textures.
- Enhanced `ICommandBuffer` with new upload operations for buffers and textures.
- Refactored `Vertex` struct for simplified memory layout and better performance.
- Updated `MeshBuilder` and rendering logic to align with new resource and shader structures.
- Added `BindlessDescriptor` support to `TextureHandle` and `BufferHandle`.
- Removed unused classes and performed general cleanup.
- Updated unit tests and demos to reflect the new architecture.

Ghost.Graphics/D3D12/D3D12CommandQueue.cs

@@ -42,6 +42,11 @@ internal unsafe class D3D12CommandQueue : ICommandQueue
         pDevice->CreateFence(0, FenceFlags.None, __uuidof<ID3D12Fence1>(), _fence.GetVoidAddressOf());
     }
 
+    ~D3D12CommandQueue()
+    {
+        Dispose();
+    }
+
     public void Submit(ICommandBuffer commandBuffer)
     {
         if (commandBuffer is D3D12CommandBuffer d3d12CommandBuffer)
@@ -113,12 +118,16 @@ internal unsafe class D3D12CommandQueue : ICommandQueue
     public void Dispose()
     {
         if (_disposed)
+        {
             return;
+        }
 
         _fenceEvent?.Dispose();
         _fence.Dispose();
         _queue.Dispose();
 
         _disposed = true;
+
+        GC.SuppressFinalize(this);
     }
 }