Link to combined rustdoc docs

[whatisaphone]

Motivation

https://rustwasm.github.io/wasm-bindgen/api/wasm_bindgen/

This is a link to the combined API docs for the wasm-bindgen family of crates. It's been super useful for me! But I'm honestly not sure how I first stumbled across it, or how other new users might find it.

Proposed Solution

Give that link a section on the main docs page. Maybe call it "API Reference" or something. That way people can find it.

Alternatives

• Link it from another page
• Do nothing