Fix outdated turbo config

[six7]

Summary

• update turbo.json to use tasks instead of deprecated pipeline

Testing

• yarn lint (fails: ESLint couldn't find configuration file)
• yarn test (fails: cross-env not found)

---

https://chatgpt.com/codex/tasks/task_e_6840234652688331be71eb6c1ee439ca

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Latest commit: 1767fa3

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[github-actions]

Commit SHA:7d67950ee175d001e566ff8f54c5f108e7010fe1
No changes to code coverage between the base branch and the head branch