Add new endpoint for fetching data from lists

[sweep-ai]

Description

This PR adds a new endpoint to the Express router in the lib/index.js file. The new endpoint /lists/ allows clients to fetch data from lists based on the category and collection query parameters.

Summary of Changes

• Added a new GET endpoint /lists/ to the Express router in lib/index.js
• Implemented the callback function for the new endpoint
• Checked for the presence of category and collection query parameters and returned an error response if they are missing
• Called the gplay.list function with the category and collection query parameters
• Mapped the results from gplay.list using the cleanUrls function
• Converted the results to the standard format using the toList function
• Sent the results back to the client using res.json.bind(res)
• Added error handling for the promise chain using the .catch function

Please review and merge this PR. Thank you!

Fixes #37.

---

🎉 Latest improvements to Sweep:

• Getting Sweep to run linters before committing! Check out Sweep Sandbox Configs to set it up.
• Added support for self-hosting! Check out Self-hosting Sweep to get started.
• [Self Hosting] Multiple options to compute vector embeddings, configure your .env file using VECTOR_EMBEDDING_SOURCE

---

💡 To get Sweep to edit this pull request, you can:

• Leave a comment below to get Sweep to edit the entire PR
• Leave a comment in the code will only modify the file
• Edit the original issue to get Sweep to recreate the PR from scratch

[sweep-ai]

GitHub actions yielded the following error.

The command that failed is flyctl deploy. Here are the relevant lines from the logs:

�[33mWARN�[0m failed to acquire lease: failed to get lease on VM 5683d611b737e8: machine ID 5683d611b737e8 lease currently held by signup-fly@cashlessconsumer.in, expires at 2023-09-19T12:11:06Z
Error: error acquiring leases on all machines
##[error]Process completed with exit code 1.

This is likely a linting or type-checking issue with the source code. Update the code changed by the PR. Don't modify the existing tests.

I'm getting the same errors 3 times in a row, so I will stop working on fixing this PR.