Add todo_list function tool for agent

[Ishneet0710]

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✨ Finishing touches

🧪 Generate unit tests

• Create PR with unit tests
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• Commit unit tests in branch ishneet/todo_tool

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[nitpicker55555]

Thanks for your contribution! Have you test it in wordle game https://www.nytimes.com/games/wordle/index.html or https://github.com/MinorJerry/WebVoyager/blob/main/data/WebVoyager_data.jsonl top 10 questions?

[Ishneet0710]

nope i havent test in wordle or webvoyager. ill do that and update the pr

[Ishneet0710]

yes seems to work well with worlde and the webvoyager tasks.

[nitpicker55555]

Curren todo_list can only provide task_status in passive way by calling browser_todo_list(operation="list"), we need to adjust it to a positive way, like after each action will agent get current task status