Complete all 5 automation tasks

[dmitrybax89]

Completed Tasks

1. Fixed login page title validation ("Swag Labs")
2. Added error message validation for locked out user
3. Implemented full purchase flow with checkout, form fill, and order confirmation
4. Added product sort validation using Scenario Outline with Examples (price asc/desc)
5. Extended test coverage:
   • Login with invalid credentials
   • Product sort by name (A-Z, Z-A) using Scenario Outline

New files

• pages/checkout.page.ts — checkout page object
• pages/category.page.ts — category/sort page object
• steps/checkout.steps.ts — checkout step definitions
• steps/category.steps.ts — sort step definitions
• data/userDetails.json — test user data

All tests passing.