set up GitHub actions

[yjhsieh2022]

• Added workflows/tdd.yml
• Commented out unused imports
• Fixed Python syntax error

[codecov[bot]]

Codecov Report

:exclamation: No coverage uploaded for pull request base (master@b5dad01). Click here to learn what that means. Patch has no changes to coverable lines.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #72 +/- ## ========================================= Coverage ? 94.73% ========================================= Files ? 8 Lines ? 342 Branches ? 0 ========================================= Hits ? 324 Misses ? 18 Partials ? 0 ```

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[yjhsieh2022]

54 #55