Add example for destructuring structs without match

[Phaiax]

Add

    // You do not need a match block to destructure structs:
    let Foo { x : x0, y: y0 } = faa;
    println!("Outside: x0 = {x0:?}, y0 = {y0}");

[rustbot]

Failed to set assignee to marioidival: cannot assign: HTTP status client error (403 Forbidden) for url (https://api.github.com/repos/rust-lang/rust-by-example/issues/1709/assignees)

Note: Only org members, users with write permissions, or people who have commented on the PR may be assigned.

[rustbot]

Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @marioidival (or someone else) soon.