feat(render): refactor pipeline & shader system for DX12 WG

Major refactor of render pipeline and shader system:
- Replaced legacy shader properties with source generator and attribute-based HLSL struct generation.
- Introduced ShaderPropertiesRegistry for runtime property layout/code registration.
- Added modular IRenderPipeline, IRenderPipelineSettings, and IRenderPayload interfaces.
- Implemented GhostRenderPipeline and ECS-driven GPUScene management.
- Added experimental DirectX 12 Work Graph support.
- Refactored shader compilation, variant hashing, and caching.
- Updated APIs for consistency and improved codegen for registration.

These changes modernize the rendering infrastructure for advanced features like work graphs and dynamic pipelines.

BREAKING CHANGE: Shader DSL, pipeline, and property APIs have changed. Existing shaders and pipeline integrations must be updated.

src/Runtime/Ghost.Graphics.D3D12/D3D12CommandBuffer.cs

@@ -442,7 +442,7 @@ internal unsafe class D3D12CommandBuffer : D3D12Object<ID3D12GraphicsCommandList
             null);
     }
 
-    public void BeginRenderPass(ReadOnlySpan<PassRenderTargetDesc> rtDescs, PassDepthStencilDesc depthDesc, bool allowUAVWrites = false)
+    public void BeginRenderPass(ReadOnlySpan<PassRenderTargetDesc> rtDescs, ref readonly PassDepthStencilDesc depthDesc, bool allowUAVWrites = false)
     {
         AssertNotDisposed();
         ThrowIfNotRecording();
@@ -786,6 +786,11 @@ internal unsafe class D3D12CommandBuffer : D3D12Object<ID3D12GraphicsCommandList
         pNativeObject->DrawInstanced(vertexCount, instanceCount, startVertex, startInstance);
     }
 
+    public void SetProgram(ref readonly SetProgramDesc desc)
+    {
+        // TODO
+    }
+
     public void DrawIndexed(uint indexCount, uint instanceCount = 1, uint startIndex = 0, int baseVertex = 0, uint startInstance = 0)
     {
         AssertNotDisposed();
@@ -836,7 +841,7 @@ internal unsafe class D3D12CommandBuffer : D3D12Object<ID3D12GraphicsCommandList
         throw new NotImplementedException();
     }
 
-    public void DispatchGraph()
+    public void DispatchGraph(ref readonly DispatchGraphDesc desc)
     {
         throw new NotImplementedException();
     }
@@ -859,7 +864,7 @@ internal unsafe class D3D12CommandBuffer : D3D12Object<ID3D12GraphicsCommandList
         var resource = _resourceDatabase.GetResource(argumentBuffer.AsResource());
         var countResource = _resourceDatabase.GetResource(countBuffer.AsResource());
 
-        pNativeObject->ExecuteIndirect(((D3D12CommandSignature)commandSignature).NativeObject, 0,
+        pNativeObject->ExecuteIndirect((ID3D12CommandSignature*)commandSignature.NativePointer, 0,
             resource, argumentOffset, countResource, countBufferOffset);
     }