Add tests by iberegsz

[beistvan]

Test Description

What does your test verify?

Checklist

• Tests pass locally (uv run robot tests/student_exercises/your_file.robot)
• Test has meaningful assertions (not just navigation)
• Test has Documentation keyword

SauceDemo Flow Tested

• Login
• Product browsing
• Cart operations
• Checkout
• Other: ___

[github-actions]

✅ Robot Framework Test Results

Status: All tests passed!

Test Output (last 10 lines)

==============================================================================
Tests.Student Exercises                                               | PASS |
4 tests, 4 passed, 0 failed
==============================================================================
Tests                                                                 | PASS |
29 tests, 29 passed, 0 failed
==============================================================================
Output:  /home/runner/work/42vienna-robotframework-workshop/42vienna-robotframework-workshop/results/output.xml
Log:     /home/runner/work/42vienna-robotframework-workshop/42vienna-robotframework-workshop/results/log.html
Report:  /home/runner/work/42vienna-robotframework-workshop/42vienna-robotframework-workshop/results/report.html

✅ Robocop Code Quality

Status: No issues found.

Robocop Output

No issues found.

Full results (log.html, report.html) are available as build artifacts.