Enhance E2E tests feature coverage

[RickBarretto]

Summary

This PR expands the Playwright E2E test suite across the public site, authentication flows, password recovery, signup validation, and the passenger app.

It also adds a reusable authenticated page fixture to reduce duplicated login setup across tests and updates Playwright timeout/worker settings to improve reliability locally and in CI.

Changes

• Added E2E tests for the passenger app dashboard, profile, trip pages, settings modal, logout, and civil servant trip requests.
• Added reusable authenticated Playwright fixture with loginAs helper.
• Added login error coverage for invalid credentials.
• Added password recovery flow tests, including cancellation, unknown account handling, PIN confirmation, and invalid PIN validation.
• Added signup validation tests for mismatched passwords, missing legal consent, and non-institutional student emails.
• Added public page tests for landing, project, team, legal documents, and not-found page recovery actions.
• Updated Playwright config with longer global/assertion timeouts and controlled local/CI worker counts.

Testing

• Added new Playwright E2E coverage under e2e/app, e2e/auth, and e2e/public.
• Existing authentication and signup tests were extended.

[RickBarretto]

Please, re-run the trigger tomorrow in other time.
I think this fails due to the time.

Notice the error is:

=========================== short test summary info ============================
FAILED apps/trips/tests/trips_tests.py::TripAPITestCase::test_cannot_create_trip_for_past_time_today - AssertionError: 201 != 400
FAILED apps/trips/tests/trips_tests.py::TripAPITestCase::test_cannot_create_trip_in_previous_days - AssertionError: 'trip_date' not found in {'route': [ErrorDetail(string='Não é possível agendar uma viagem para um horário que já passou hoje.', code='invalid')]}
FAILED apps/trips/tests/trips_tests.py::TripAPITestCase::test_driver_can_list_and_retrieve_own_in_progress_trip - AssertionError: 1 not found in []
FAILED apps/trips/tests/trips_tests.py::TripAPITestCase::test_driver_can_list_but_not_retrieve_another_occupied_trip - AssertionError: 1 not found in []
FAILED apps/trips/tests/trips_tests.py::TripAPITestCase::test_driver_list_contains_only_today_trips - AssertionError: 1 not found in []
================== 5 failed, 118 passed, 97 warnings in 3.66s ==================

I'm at 21h51 (GMT-3) right now. Do the math: 24h - 21h = 3h...