chore(release): v0.5.0

- Mail improvements: numeric index, hook alias, --body alias, bulk delete, parallel queries
- New aliases: gt bd, gt work, --comment, read
- OpenCode agent preset, config-based role system
- Deacon status line display, hook registry
- Squash merge in refinery
- Crew session stability fixes
- Many bug fixes

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

npm-package/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@gastown/gt",
-  "version": "0.4.0",
+  "version": "0.5.0",
   "description": "Gas Town CLI - multi-agent workspace manager with native binary support",
   "main": "bin/gt.js",
   "bin": {