refactor: Clean up RHI interface and implement descriptor set pooling

- Remove unnecessary inline keywords from RHICommandList
- Add TextureType enum for proper texture type classification
- Update DescriptorSet API to support binding with pipeline layout
- Simplify D3D12CommandList implementation
- Implement descriptor set binding with pipeline layout for both D3D12 and OpenGL

engine/src/RHI/D3D12/D3D12DescriptorSet.cpp

@@ -43,6 +43,12 @@ void D3D12DescriptorSet::Shutdown() {
     }
 }
 
+void D3D12DescriptorSet::Bind() {
+}
+
+void D3D12DescriptorSet::Unbind() {
+}
+
 void D3D12DescriptorSet::Update(uint32_t offset, RHIResourceView* view) {
     (void)offset;
     (void)view;
@@ -53,10 +59,6 @@ void D3D12DescriptorSet::UpdateSampler(uint32_t offset, RHISampler* sampler) {
     (void)sampler;
 }
 
-void* D3D12DescriptorSet::GetNativeHandle() {
-    return this;
-}
-
 D3D12_GPU_DESCRIPTOR_HANDLE D3D12DescriptorSet::GetGPUHandle(uint32_t index) const {
     if (m_heap == nullptr) {
         return D3D12_GPU_DESCRIPTOR_HANDLE{0};
@@ -65,5 +67,14 @@ D3D12_GPU_DESCRIPTOR_HANDLE D3D12DescriptorSet::GetGPUHandle(uint32_t index) con
     return D3D12_GPU_DESCRIPTOR_HANDLE{ handle.ptr };
 }
 
+void D3D12DescriptorSet::WriteConstant(uint32_t binding, const void* data, size_t size, size_t offset) {
+    size_t requiredSize = offset + size;
+    if (m_constantBufferData.size() < requiredSize) {
+        m_constantBufferData.resize(requiredSize);
+    }
+    memcpy(m_constantBufferData.data() + offset, data, size);
+    m_constantBufferDirty = true;
+}
+
 } // namespace RHI
 } // namespace XCEngine