feat: add Playwright integration with simulate mode

[d-claro]

What was done

• Added Playwright integration to run automated tests directly from the terminal
• Added run-test command that links test cases to Playwright test files
• Added simulate mode for environments where Playwright browsers cannot be installed
• Added playwright_file field to test cases in test_cases.json
• Updated menu with Run Playwright Test option including mode selection
• Created example test file in tests/test_login.py

New Command

• run-test TC-001 — runs the Playwright test linked to a test case
• run-test TC-001 --simulate — simulates the test run step by step without a browser

How it works

• Each test case in test_cases.json has a playwright_file field linking to its test file
• When the test runs, the state is automatically updated to Passed or Failed
• Simulate mode shows each test step with expected results — useful for demos and incompatible environments

Notes

• Requires Playwright installed and browsers configured for real mode
• Simulate mode works on any machine without additional setup
• Open for suggestions and feedback from the team.