Changes:

- editor project
- build system fixes
- dummy data editor panels mock

editor/panels/scene_hierarchy_panel.cpp

@@ -0,0 +1,34 @@
+#include "scene_hierarchy_panel.hpp"
+
+#include <imgui.h>
+
+void SceneHierarchyPanel::drawNode(const Node& node) {
+  if (node.children.empty()) {
+    ImGuiTreeNodeFlags flags = ImGuiTreeNodeFlags_Leaf |
+                               ImGuiTreeNodeFlags_NoTreePushOnOpen |
+                               ImGuiTreeNodeFlags_SpanAvailWidth;
+    if (node.name == selected) {
+      flags |= ImGuiTreeNodeFlags_Selected;
+    }
+    ImGui::TreeNodeEx(node.name.c_str(), flags);
+    if (ImGui::IsItemClicked()) {
+      selected = node.name;
+    }
+    return;
+  }
+
+  if (ImGui::TreeNodeEx(node.name.c_str(), ImGuiTreeNodeFlags_SpanAvailWidth)) {
+    for (const Node& child : node.children) {
+      drawNode(child);
+    }
+    ImGui::TreePop();
+  }
+}
+
+void SceneHierarchyPanel::onUpdate(const sophia::FrameInfo&) {
+  ImGui::Begin("Scene Hierarchy");
+  for (const Node& node : nodes) {
+    drawNode(node);
+  }
+  ImGui::End();
+}