feat(admin): extend housekeeping permissions page with groups, presets, audit, test, import/export, rank overview and dependency tracking

- Add group_name, depends_on and updated_by columns to website_housekeeping_permissions
- Add migration 0016 for new columns
- Rewrite housekeeping page with 7 tabs: Overview, Manage, Import/Export, Rank overview, Presets, Test, Audit log
- Add permission groups/categories with filtering
- Add bulk JSON import/export
- Add rank overview grouped by permission category
- Add permission presets for Moderator (rank 5), Admin (rank 7), Super Admin (rank 8)
- Add audit logging for all permission changes via AdminAuditLog
- Add test mode to check permissions by rank
- Add dependency tracking with warnings for missing dependencies
- Add overview dashboard with statistics
- Add Dutch and English translations for all new features

prisma/migrations/0016_housekeeping_group_field.sql

@@ -0,0 +1,6 @@
+ALTER TABLE `website_housekeeping_permissions`
+  ADD COLUMN `group_name` VARCHAR(100) DEFAULT NULL AFTER `description`,
+  ADD COLUMN `depends_on` VARCHAR(255) DEFAULT NULL AFTER `group_name`,
+  ADD COLUMN `updated_by` INT DEFAULT NULL AFTER `updated_at`;
+
+-- Migration tracking (no model change needed for audit log usage)