Fix trans implied groups computation

This module is a technical fix for the way Odoo works out which groups are indirectly granted through other groups (for example, a Sales Manager group that implies a Sales User group). It changes the res.groups model by making the trans_implied_ids field recursive, so the full chain of implied groups is computed correctly instead of only the first level.

Because of this, screens and features that rely on that list — such as the list of groups shown per application and the categories used to organise groups — display the correct groups and the correct category. Before the fix, a group could appear under the wrong category or with the wrong type.

The module adds no menus, buttons, reports or scheduled actions of its own. It only corrects an existing computation in the base access-rights system. It depends only on the base module, so it applies to every Odoo installation and affects all areas that use groups and access rights, including the group management screens and the application/group overview.