refactor(RHI): remove void* from CommandList interfaces and fix OpenGL MRT bug

- Remove void* parameters from RHICommandList abstract interface
- TransitionBarrier, SetVertexBuffer, SetIndexBuffer, SetRenderTargets,
  ClearRenderTarget, ClearDepthStencil, CopyResource now use RHIResourceView*
- SetPipelineState now uses RHIPipelineState* instead of void*
- Simplified SetVertexBuffer to 3 params, SetIndexBuffer to 2 params
- Add internal D3D12 APIs for native type support (low-level escape hatch)
- Fix OpenGL SetRenderTargets to call glDrawBuffers for MRT support
- Update tests to match new interface signatures

All 289 RHI tests pass (158 unit + 64 OpenGL backend + 58 D3D12 backend + 8 integration + 1 disabled)

engine/src/RHI/D3D12/D3D12Texture.cpp

@@ -183,7 +183,6 @@ void D3D12Texture::Shutdown() {
     if (m_ownsResource) {
         m_resource.Reset();
     }
-    m_resource.Reset();
 }
 
 } // namespace RHI