Zero-dependency Rust rewrite of the breadboard launcher. Parses
.desktop files in-process (no awk subprocesses), builds a tab-separated
cache for wofi dmenu, and supports stale-while-revalidate background
rebuilds. Apps-only for now; icon support to be added later.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
