vision doc: what do people love about Rust?

Contains suggestions from others during code review.

Co-authored-by: Jakub Beránek <[email protected]>
Co-authored-by: Pete LeVasseur <[email protected]>
Co-authored-by: Jack Huey <[email protected]>
Co-Authored-By: Claude Opus 4.5 <[email protected]>

Author: 5 people