breadbox: fast Rust application launcher for wofi

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>

.gitignore

@@ -0,0 +1,21 @@
+/target/
+
+# Editor files
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+
+# OS artifacts
+.DS_Store
+Thumbs.db
+
+# Environment / secrets
+.env
+.env.*
+*.pem
+*.key
+
+# Claude Code session data
+.claude/