feat: add play / editor mode

destrum/src/Scene/SceneManager.cpp

@@ -16,17 +16,27 @@ Scene& SceneManager::GetCurrentScene() const {
 
 void SceneManager::Update(float dt) {
     for (const auto& scene : m_activeScenes) {
-        scene->Update(dt);
+        if (m_playing) {
+            scene->Update(dt);
+        } else {
+            scene->CommitPendingAdditions();
+        }
     }
 }
 
 void SceneManager::FixedUpdate(float dt) {
+    if (!m_playing) {
+        return;
+    }
     for (const auto& scene : m_activeScenes) {
         scene->FixedUpdate(dt);
     }
 }
 
 void SceneManager::LateUpdate(float dt) {
+    if (!m_playing) {
+        return;
+    }
     for (const auto& scene : m_activeScenes) {
         scene->LateUpdate(dt);
     }