refactor: rename ui_editor to editor for consistency

editor/src/Managers/SceneManager.h

@@ -0,0 +1,87 @@
+#pragma once
+
+#include "Core/GameObject.h"
+#include <unordered_map>
+#include <vector>
+#include <memory>
+#include <optional>
+
+#include <XCEngine/Core/Event.h>
+
+namespace UI {
+
+struct ClipboardData {
+    std::string name;
+    std::vector<std::unique_ptr<Component>> components;
+    std::vector<ClipboardData> children;
+};
+
+class SceneManager {
+public:
+    static SceneManager& Get() {
+        static SceneManager instance;
+        return instance;
+    }
+
+    EntityID CreateEntity(const std::string& name, EntityID parent = INVALID_ENTITY_ID);
+
+    GameObject* GetEntity(EntityID id) {
+        auto it = m_entities.find(id);
+        if (it != m_entities.end()) {
+            return &it->second;
+        }
+        return nullptr;
+    }
+
+    const GameObject* GetEntity(EntityID id) const {
+        auto it = m_entities.find(id);
+        if (it != m_entities.end()) {
+            return &it->second;
+        }
+        return nullptr;
+    }
+
+    const std::vector<EntityID>& GetRootEntities() const {
+        return m_rootEntities;
+    }
+
+    void DeleteEntity(EntityID id);
+
+    void RenameEntity(EntityID id, const std::string& newName) {
+        auto* entity = GetEntity(id);
+        if (entity) {
+            entity->name = newName;
+            OnEntityChanged.Invoke(id);
+        }
+    }
+
+    void CopyEntity(EntityID id);
+
+    EntityID PasteEntity(EntityID parent = INVALID_ENTITY_ID);
+
+    EntityID DuplicateEntity(EntityID id);
+
+    void MoveEntity(EntityID id, EntityID newParent);
+
+    void CreateDemoScene();
+
+    bool HasClipboardData() const { return m_clipboard.has_value(); }
+
+    XCEngine::Core::Event<EntityID> OnEntityCreated;
+    XCEngine::Core::Event<EntityID> OnEntityDeleted;
+    XCEngine::Core::Event<EntityID> OnEntityChanged;
+    XCEngine::Core::Event<> OnSceneChanged;
+
+private:
+    SceneManager() = default;
+
+    ClipboardData CopyEntityRecursive(const GameObject* entity);
+    EntityID PasteEntityRecursive(const ClipboardData& data, EntityID parent);
+
+    EntityID m_nextEntityId = 1;
+    std::unordered_map<EntityID, GameObject> m_entities;
+    std::vector<EntityID> m_rootEntities;
+    std::optional<ClipboardData> m_clipboard;
+};
+
+}