feat(skills): integrate delegate-job skill (squashed from delegate-job-skill)

- Copy delegate-job-skill/skills/delegate-job/ → skills/delegate-job/
- Move requirements.txt (paho-mqtt>=2.0.0) into the new location
- Refactor outdated hardcoded paths (~/PuKi/lab/, ~/.hermes/skills/) to dynamic resolution
- Add MQTT connection timeout / retry hardening
- Remove legacy delegate-job-skill/ directory
- Update .gitignore

Note: delegate-job-skill git history is squashed — preserved content, dropped commit lineage.

.gitignore

@@ -7,5 +7,8 @@ test-sessions.yaml
 test-sessions.yaml.bak
 test-sessions.yaml.lock
 
-# 자체 git repo 임베드 (별도 관리)
-delegate-job-skill/
+# delegate-job 임시/런타임 산출물
+.hermes/
+.venv/
+__pycache__/
+*.pyc