Source code rules - Branch rule list refinement
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### Problem to solve
The [MVC proposal](https://gitlab.com/gitlab-org/gitlab/-/issues/351468) proposed a minimal list to manage branch rules, but there may be room for improvement.
**Potential improvements**
- Additional details in the list view
- Protected branch summary
- Approvals summary
- Additional rules summary
- Alternate UI pattern
- See exploration https://gitlab.com/gitlab-org/gitlab/-/issues/342087
### Propsal
Improve branch rules list display
issue