report: grow the Prompter port and move display_path out of the ui module

Prompter gains interactive(), select() and text() (with the Validator
type), and confirm() now propagates cancellation as Err so flows abort
instead of silently taking a default when the user hits Ctrl+C. The
terminal prompter implements the full port; the port also re-exports
the path display helper, which is pure presentation formatting used by
events and messages rather than terminal code.

src/new/questions.rs

@@ -555,7 +555,7 @@ pub async fn offer_verification(
     no_verify: bool,
 ) {
     let tree = opts.target_dir(&std::env::current_dir().unwrap_or_default());
-    let display = crate::ui::display_path(&tree);
+    let display = crate::report::display_path(&tree);
     let display = if display.is_empty() {
         ".".to_string()
     } else {