refactor(new_editor): tighten app dependency boundaries

new_editor/app/Host/ShaderResourceDescriptorAllocator.h

@@ -0,0 +1,31 @@
+#pragma once
+
+#ifndef NOMINMAX
+#define NOMINMAX
+#endif
+
+#include <XCEngine/RHI/RHIDevice.h>
+#include <XCEngine/RHI/RHITexture.h>
+
+#include <d3d12.h>
+
+namespace XCEngine::UI::Editor::Host {
+
+class ShaderResourceDescriptorAllocator {
+public:
+    virtual ~ShaderResourceDescriptorAllocator() = default;
+
+    virtual bool Initialize(::XCEngine::RHI::RHIDevice& device, UINT descriptorCount = 64u) = 0;
+    virtual void Shutdown() = 0;
+
+    [[nodiscard]] virtual bool IsInitialized() const = 0;
+    virtual bool CreateTextureDescriptor(
+        ::XCEngine::RHI::RHITexture* texture,
+        D3D12_CPU_DESCRIPTOR_HANDLE* outCpuHandle,
+        D3D12_GPU_DESCRIPTOR_HANDLE* outGpuHandle) = 0;
+    virtual void Free(
+        D3D12_CPU_DESCRIPTOR_HANDLE cpuHandle,
+        D3D12_GPU_DESCRIPTOR_HANDLE gpuHandle) = 0;
+};
+
+} // namespace XCEngine::UI::Editor::Host