feat(auth): enhance authentication system with multi-user support and admin role management

- Implemented multi-user authentication with role-based access control.
- Added environment variables for initial admin user setup.
- Updated README and example environment file with new authentication options.
- Introduced user and system configuration models in the database schema.
- Enhanced authentication middleware to support user registration and role management.
- Updated frontend to handle new authentication flows, including admin user creation and role updates.

e2e/tests/global-teardown.ts

@@ -0,0 +1,14 @@
+import { promises as fs } from "fs";
+import path from "path";
+
+const AUTH_STATE_PATH = path.resolve(__dirname, ".auth/storageState.json");
+
+const globalTeardown = async () => {
+  try {
+    await fs.unlink(AUTH_STATE_PATH);
+  } catch {
+    // Ignore missing auth state file.
+  }
+};
+
+export default globalTeardown;