feat: add staff-picker worker

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What does this PR do?

🤖 Generated by Copilot at 93df078

This pull request adds a new staff-picks worker package that allows staff members to select and rank lens profiles that they recommend to users. The worker exposes several routes to add, remove, and fetch staff-picks from the database. The pull request also updates the pnpm-lock.yaml file and the database.types.ts file to reflect the new dependencies and database table. Additionally, the pull request simplifies the response creation in the preferences worker handlers by using a helper function from the @hey/lib package.

Related issues

Fixes # (issue)

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Enhancement (non-breaking small changes to existing functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Explanation of the changes

🤖 Generated by Copilot at 93df078

• Add a new worker package for the staff-picks feature (link-link)
• Define the routes and handlers for adding, removing, and fetching staff-picks (link-link)
• Create helper functions for building custom requests and checking staff status (link-link)
• Add type definitions for the custom request and the environment variables (link)
• Configure the worker deployment and runtime settings using wrangler (link)
• Enable linting, typescript compilation, and type checking for the worker code (link, link)
• Document the worker functionality and configuration in README and .dev.vars.example files (link, link)
• Add a new interface for the staff-picks table in the database (link)
• Update the preferences worker handlers to use the response helper function from the @hey/lib package (link-link)
• Update the versions of the @ethersproject dependencies in the pnpm-lock.yaml file (link-link)
• Add a new entry for the staff-picks worker package in the pnpm-lock.yaml file (link)

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