Add EditorContext, refactor utils, add system managers

src/app/editor/system/popup_manager.cc

@@ -0,0 +1,19 @@
+#include "popup_manager.h"
+
+#include "imgui/imgui.h"
+
+namespace yaze {
+namespace app {
+namespace editor {
+
+PopupManager::PopupManager() {
+}
+
+PopupManager::~PopupManager() {
+}
+
+
+
+} // namespace editor
+} // namespace app
+} // namespace yaze