Added UI and BDD testing for List method.

[gothmother]

• Added web_steps.py
• Added enviroment.py
  • I changed the port in this template (prof had 8080) to 8000 because our test page is running on 8000, FYI @yitao-zhou
• Fixed Yitao’s index.html typo (“promotion_gender” > "promotion_promotype")
• Created promotions.features for List actions

[codecov[bot]]

Codecov Report

Patch and project coverage have no change.

Comparison is base (a4e583f) 94.75% compared to head (29eeca2) 94.75%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #78 +/- ## ======================================= Coverage 94.75% 94.75% ======================================= Files 8 8 Lines 305 305 ======================================= Hits 289 289 Misses 16 16 ``` Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=CSCI-GA-2820-SP23-001). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=CSCI-GA-2820-SP23-001)

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[gothmother]

stuck on failed BDD tests in github. ran tests locally and everything’s passed but can't figure out why failing on GitHubt