Add user-visible output for remote operations (#25849)

This PR adds toasts for reporting success and errors from remote git
operations. This PR also adds a focus handle to notifications, in
anticipation of making them keyboard accessible.

Release Notes:

- N/A

---------

Co-authored-by: julia <julia@zed.dev>

crates/outline/src/outline.rs

@@ -359,7 +359,7 @@ pub fn render_item<T>(
         outline_item.highlight_ranges.iter().cloned(),
     );
 
-    StyledText::new(outline_item.text.clone()).with_highlights(&text_style, highlights)
+    StyledText::new(outline_item.text.clone()).with_default_highlights(&text_style, highlights)
 }
 
 #[cfg(test)]