Refactor new_editor window architecture and routing

new_editor/app/UtilityWindows/EditorUtilityWindowRegistry.h

@@ -0,0 +1,27 @@
+#pragma once
+
+#include "UtilityWindows/EditorUtilityWindowKind.h"
+#include "UtilityWindows/EditorUtilityWindowPanel.h"
+
+#include <XCEngine/UI/Types.h>
+
+#include <memory>
+#include <string_view>
+
+namespace XCEngine::UI::Editor::App {
+
+struct EditorUtilityWindowDescriptor {
+    EditorUtilityWindowKind kind = EditorUtilityWindowKind::None;
+    std::string_view windowId = {};
+    const wchar_t* title = L"";
+    ::XCEngine::UI::UISize preferredOuterSize = {};
+    ::XCEngine::UI::UISize minimumOuterSize = {};
+};
+
+const EditorUtilityWindowDescriptor* ResolveEditorUtilityWindowDescriptor(
+    EditorUtilityWindowKind kind);
+
+std::unique_ptr<EditorUtilityWindowPanel> CreateEditorUtilityWindowPanel(
+    EditorUtilityWindowKind kind);
+
+} // namespace XCEngine::UI::Editor::App