Charlie Marsh 71d5661bd8 Add a custom suggestion for uv add dotenv (#7799) ...

## Summary

This was brought up on Twitter recently. `dotenv` hasn't been updated in
years and doesn't build successfully anymore. Users almost always mean
to install `python-dotenv`. I think we can add helpful hints here to
point users in the right direction.

## Test Plan

![Screenshot 2024-09-29 at 9 27
27 PM](https://github.com/user-attachments/assets/72585860-9d98-4478-9eac-2c17ac06178b)

2024-09-30 17:00:31 +00:00

..

src

Add a custom suggestion for uv add dotenv (#7799)

2024-09-30 17:00:31 +00:00

Cargo.toml

Add a custom suggestion for uv add dotenv (#7799)

2024-09-30 17:00:31 +00:00