ctrl+v image + @file accepts images (#1695)

allow ctrl+v in TUI for images + @file that are images are appended as
raw files (and read by the model) rather than pasted as a path that
cannot be read by the model.

Re-used components and same interface we're using for copying pasted
content in
72504f1d9c.
@aibrahim-oai as you've implemented this, mind having a look at this
one?


https://github.com/user-attachments/assets/c6c1153b-6b32-4558-b9a2-f8c57d2be710

---------

Co-authored-by: easong-openai <easong@openai.com>
Co-authored-by: Daniel Edrisian <dedrisian@openai.com>
Co-authored-by: Michael Bolin <mbolin@openai.com>

codex-rs/tui/src/app.rs

@@ -145,6 +145,15 @@ impl App {
                         },
                     )?;
                 }
+                TuiEvent::AttachImage {
+                    path,
+                    width,
+                    height,
+                    format_label,
+                } => {
+                    self.chat_widget
+                        .attach_image(path, width, height, format_label);
+                }
             }
         }
         Ok(true)