Refactor editor host resource boundary

editor/app/Host/Interfaces/EditorHostResourceService.h

@@ -0,0 +1,45 @@
+#pragma once
+
+#include <cstddef>
+#include <cstdint>
+#include <filesystem>
+#include <string>
+
+namespace XCEngine::UI::Editor::Host {
+
+enum class EditorHostPngResourceKind : std::uint8_t {
+    FolderIcon = 0,
+    GameObjectIcon,
+    SceneIcon,
+    Logo,
+    LogoIcon,
+    CameraGizmoIcon,
+    DirectionalLightGizmoIcon,
+    PointLightGizmoIcon,
+    SpotLightGizmoIcon,
+    PlayButtonIcon,
+    PauseButtonIcon,
+    StepButtonIcon,
+};
+
+struct EditorHostResourceBytes {
+    const std::uint8_t* data = nullptr;
+    std::size_t size = 0u;
+
+    bool IsValid() const {
+        return data != nullptr && size > 0u;
+    }
+};
+
+class EditorHostResourceService {
+public:
+    virtual ~EditorHostResourceService() = default;
+
+    virtual bool TryLoadPngResource(
+        EditorHostPngResourceKind kind,
+        EditorHostResourceBytes& outBytes,
+        std::string& outError) const = 0;
+    virtual std::filesystem::path GetExecutableDirectory() const = 0;
+};
+
+} // namespace XCEngine::UI::Editor::Host