fix(input) ctrl-j support was lost switching to keyBindings.ts (#6305)

Co-authored-by: Bryan Morgan <bryanmorgan@google.com>

packages/cli/src/config/keyBindings.ts

@@ -147,6 +147,7 @@ export const defaultKeyBindings: KeyBindingConfig = {
     { key: 'return', command: true },
     { key: 'return', paste: true },
     { key: 'return', shift: true },
+    { key: 'j', ctrl: true },
   ],
 
   // External tools