This is now replaced with the more capable and correct `Stack` trait, implemented on `Branch`.
The new endpoints are:
create_series,
remove_series,
update_series_name,
update_series_description,
push_stack,
There is just too big of a dependency in both directions to be able to have a separation at this time. The gitbutler-repo crate is needed for the stacking functionality and the `rebase` module inside of it needs to use the new API in order to maintain consistency during rebasing.
