feat: update editor ui framework and assets

editor/src/UI/BuiltInIcons.h

@@ -0,0 +1,31 @@
+#pragma once
+
+#include <imgui.h>
+
+struct ID3D12Device;
+struct ID3D12CommandQueue;
+
+namespace XCEngine {
+namespace Editor {
+namespace UI {
+
+class ImGuiBackendBridge;
+
+enum class AssetIconKind {
+    Folder,
+    File,
+    GameObject
+};
+
+void InitializeBuiltInIcons(
+    ImGuiBackendBridge& backend,
+    ID3D12Device* device,
+    ID3D12CommandQueue* commandQueue);
+
+void ShutdownBuiltInIcons();
+
+void DrawAssetIcon(ImDrawList* drawList, const ImVec2& min, const ImVec2& max, AssetIconKind kind);
+
+} // namespace UI
+} // namespace Editor
+} // namespace XCEngine