feat: simplify RBAC roles and remove dev role switcher

- Simplified RBAC system to two roles: super_admin and user.
- Removed tenant_admin and rp_admin roles across backend and frontend.
- Removed Dev Role Switcher feature from adminfront.
- Updated all handlers, middlewares, and navigation to reflect the new role model.
- Fixed backend build errors and updated tests.

backend/internal/bootstrap/keto_sync.go

@@ -76,17 +76,10 @@ func SyncKetoRelations(db *gorm.DB, outbox repository.KetoOutboxRepository) erro
 				Subject:   "User:" + u.ID,
 				Action:    domain.KetoOutboxActionCreate,
 			})
-		} else if role == domain.RoleTenantAdmin && u.TenantID != nil {
-			_ = outbox.Create(ctx, &domain.KetoOutbox{
-				Namespace: "Tenant",
-				Object:    *u.TenantID,
-				Relation:  "admins",
-				Subject:   "User:" + u.ID,
-				Action:    domain.KetoOutboxActionCreate,
-			})
 		}
 	}
 
 	slog.Info("✅ Keto ReBAC synchronization items added to Outbox.")
 	return nil
 }
+