feat(identity): redesign identity module and introduce RBAC foundation

- Redesign the Identity module with a richer domain model.
- Extend the User entity to support username, Authentik integration, activity tracking, and storage information.
- Add Role and Permission domain models with many-to-many relationships.
- Implement RBAC foundation using UserRole, RolePermission, and UserPermission mappings.
- Add user storage quota and usage fields with default values.
- Introduce Authentik identifiers and synchronization metadata.
- Refactor user domain logic for role and permission management.
- Update Prisma schema to support the new identity architecture.
- Improve JWT authentication and permission guard integration.
- Update repositories, handlers, controllers, mappers, DTOs, and Swagger configuration.
- Refresh environment configuration and project dependencies.

tests/fixtures/user.fixture.ts

@@ -0,0 +1,11 @@
+import { requestPost, requestDelete } from '../helpers/request';
+
+export async function createDummyUser(payload: any) {
+  const res = await requestPost('/user', 'admin', payload);
+  return res;
+}
+
+export async function deleteDummyUser(userId: string) {
+  // soft delete
+  await requestDelete(`/users/${userId}`, 'admin');
+}