chore: bump plugin version to 0.5.0

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: SamHatoum

.claude-plugin/plugin.json

@@ -1,6 +1,6 @@
 {
   "name": "auto-agent",
-  "version": "0.4.0",
+  "version": "0.5.0",
   "description": "Connect your coding agent to Auto",
   "author": {
     "name": "BeOnAuto"