fix: stop self-kill loop over the cd prefix rule

A live codex in the right cwd must not be pkilled to relaunch 'with the
prefix'; exit codes after the wrapper's own pkill are not spawn errors.
Bump to 0.1.3.

.claude-plugin/plugin.json

@@ -1,5 +1,5 @@
 {
   "name": "codex-crew",
-  "version": "0.1.2",
+  "version": "0.1.3",
   "description": "Codex as a first-class Claude Code subagent: delegate tasks, review code, consult on specs/plans. Inherits user codex config (no sandboxes), resumable sessions, deterministic stall detection."
 }