vision doc: what do people love about Rust?

Contains suggestions from others during code review.

Co-authored-by: Jakub Beránek <berykubik@gmail.com>
Co-authored-by: Pete LeVasseur <plevasseur@gmail.com>
Co-authored-by: Jack Huey <jackh726@gmail.com>
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: 5 people