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/schema.prisma

@@ -1623,6 +1623,9 @@ model WebsiteHousekeepingPermissions {
   permission  String   @unique @db.VarChar(255)
   minRank     Int      @map("min_rank")
   description String?  @db.VarChar(255)
+  groupName   String?  @map("group_name") @db.VarChar(100)
+  dependsOn   String?  @map("depends_on") @db.VarChar(255)
+  updatedBy   Int?     @map("updated_by")
   createdAt   DateTime? @map("created_at") @db.Timestamp(0)
   updatedAt   DateTime? @map("updated_at") @db.Timestamp(0)