chore: update orchestrator/chat skills and dev tooling

- Orchestrator skill: add Claude vs Codex guidelines, structured audit
  patterns, narrow single-purpose review passes
- Chat skill: improved coordination helpers
- Dev script and config tweaks

paseo.json

@@ -8,7 +8,7 @@
     "terminals": [
       {
         "name": "dev",
-        "command": "SESSION_NAME=\"${PWD##*/}\"; if ! tmux has-session -t \"$SESSION_NAME\" 2>/dev/null; then tmux new-session -d -s \"$SESSION_NAME\" -c \"$PWD\" \"npm run dev\"; fi"
+        "command": "npm run dev"
       }
     ]
   }