Fix RHI format conversion and test viewDesc initialization

- Fix CreateTexture to use ToD3D12() for format conversion
- Fix CreateRenderTargetView to use ToD3D12() for format conversion
- Fix CreateDepthStencilView to use ToD3D12() for format conversion
- Fix CreateShaderResourceView to use ToD3D12() for format conversion
- Update test to pass correct format in ResourceViewDesc

These fixes resolve CommandList_ClearDepthStencil_WithRealView test.
Other RTV-related tests still fail with DXGI_ERROR_NOT_CURRENTLY_AVAILABLE
from CreateCommandAllocator - further investigation needed.

tests/RHI/unit/test_command_list.cpp

@@ -187,7 +187,9 @@ TEST_P(RHITestFixture, CommandList_ClearRenderTarget_WithRealView) {
     RHITexture* texture = GetDevice()->CreateTexture(texDesc);
     ASSERT_NE(texture, nullptr);
 
-    RHIResourceView* rtv = GetDevice()->CreateRenderTargetView(texture, {});
+    ResourceViewDesc viewDesc = {};
+    viewDesc.format = texDesc.format;
+    RHIResourceView* rtv = GetDevice()->CreateRenderTargetView(texture, viewDesc);
     ASSERT_NE(rtv, nullptr);
 
     float color[4] = { 1.0f, 0.0f, 0.0f, 1.0f };