acp: Add Reauthenticate to dropdown (#36878)

Release Notes:

- N/A

Co-authored-by: Conrad Irwin <conrad.irwin@gmail.com>

crates/zed_actions/src/lib.rs

@@ -290,7 +290,9 @@ pub mod agent {
             Chat,
             /// Toggles the language model selector dropdown.
             #[action(deprecated_aliases = ["assistant::ToggleModelSelector", "assistant2::ToggleModelSelector"])]
-            ToggleModelSelector
+            ToggleModelSelector,
+            /// Triggers re-authentication on Gemini
+            ReauthenticateAgent
         ]
     );
 }