Here are the issues concerning the CSS part, we encountered with @julien-deramond.
This PR is a split of #36398
Tackled by the PR
Re-order for default objects with (https://github.com/twbs/bootstrap/pull/36398/commits/633fca4fc3e6a97fc0064f803f4a85fe79afbcc4)
Alphabetical reordering of the default objects. If these changes are approved, it might be great to see if other objects could be updated this way. Just as an example : https://github.com/twbs/bootstrap/blob/416f4905f13c2ca3096343e0a5a4934c8c0ced3f/js/src/dom/event-handler.js#L24