Git Panel: separate new and changed (#24181)

Release Notes:

- N/A

---------

Co-authored-by: conrad <conrad@zed.dev>
Co-authored-by: nate <nate@zed.dev>

crates/git/src/status.rs

@@ -153,6 +153,7 @@ impl FileStatus {
                 (StatusCode::Added, _) | (_, StatusCode::Added) => true,
                 _ => false,
             },
+            FileStatus::Untracked => true,
             _ => false,
         }
     }