REFEDIT: reference prompts, -REFEDIT, REFSET, nested references, xref write-back

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/app/command_driver/mod.rs

@@ -80,7 +80,7 @@ use crate::command::{CmdResult, SelectionEntity, StepInput};
 use codec::Handle;
 use iced::Task;
 
-mod clipboard;
+pub(super) mod clipboard;
 mod constraint;
 mod dim_edit;
 mod entity_commit;