BrainCore Foundation 0.82.7 - Directory UI V1

- Improves Directory Manager UI without changing data model.
- Replaces backend-like table view with actor cards.
- Adds directory stats: actors, active actors, producers.
- Groups actor form into Identity, Main Contact and Notes.
- Keeps shortcode [braincore_directory_manager_v1].
- Keeps Workbench integration from 0.82.6.
