tui: fix wrapping in trust_directory (#5007)

Refactor trust_directory to use ColumnRenderable & friends, thus
correcting wrapping behavior at small widths. Also introduce
RowRenderable with fixed-width rows.

- fixed wrapping in trust_directory
- changed selector cursor to match other list item selections
- allow y/n to work as well as 1/2
- fixed key_hint to be standard

before:
<img width="661" height="550" alt="Screenshot 2025-10-09 at 9 50 36 AM"
src="https://github.com/user-attachments/assets/e01627aa-bee4-4e25-8eca-5575c43f05bf"
/>

after:
<img width="661" height="550" alt="Screenshot 2025-10-09 at 9 51 31 AM"
src="https://github.com/user-attachments/assets/cb816cbd-7609-4c83-b62f-b4dba392d79a"
/>

codex-rs/tui/src/diff_render.rs

@@ -72,7 +72,7 @@ impl From<DiffSummary> for Box<dyn Renderable> {
             )));
         }
 
-        Box::new(ColumnRenderable::new(rows))
+        Box::new(ColumnRenderable::with(rows))
     }
 }