fix: force acknowledgement of no rewards for existing hubs

[Wazzymandias]

Why is this change needed?

Force acknowledgement of no rewards for hubs that are already running

Merge Checklist

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PR-Codex overview

The focus of this PR is to add a prompt for hub operator agreement before running the script and updating the environment file accordingly.

Detailed summary

• Added a function prompt_for_hub_operator_agreement to prompt for agreement
• Created a function update_env_file to update or create the environment file based on agreement
• Improved user input handling and validation
• Added logic to check for existing agreement in the environment file
• Updated the script flow to handle agreement properly

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Name	Status	Preview	Comments	Updated (UTC)
hub-monorepo	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jul 16, 2024 7:56pm

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Latest commit: c92a12c

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