editor_ops

Delete and duplicate the current editor selection, each as one undo step. Delete despawns every selected entity and clears the selection; duplicate clones each selected entity via entity.duplicate — a full component, attribute, visual, and material clone that includes descendants — and selects the copies. Both wrap the batch in a multiplayer undo operation so a single Ctrl+Z reverts the whole action. The editor scene entrypoint binds these to Delete and Ctrl+D.