Support Tokio documentation

[007qr]

Feature request

Summary

Add support for the Tokio documentation set to DevDocs.

Tokio is the de facto asynchronous runtime for Rust and is one of the most widely used libraries in the Rust ecosystem. Many Rust developers spend a significant amount of time referencing Tokio's documentation alongside the Rust standard library, making it a strong candidate for inclusion in DevDocs.

Having Tokio available offline and searchable through DevDocs would improve the experience for developers building async applications, web services, networking tools, and distributed systems in Rust.

Examples

Official documentation:

• https://docs.rs/tokio/latest/tokio/

Repository:

• https://github.com/tokio-rs/tokio

Commonly referenced modules and APIs:

• tokio::spawn
• tokio::task
• tokio::sync
• tokio::net
• tokio::time
• tokio::fs
• tokio::process
• tokio::select!

Why this would be valuable:

• Tokio is the most popular async runtime in the Rust ecosystem.
• It is a dependency of many widely used Rust frameworks and libraries, including Axum, Hyper, and Tonic.
• Rust developers frequently need to search Tokio APIs while developing async applications.
• Offline access through DevDocs would make Rust development more productive and reduce context switching between multiple documentation sites.