examples: add zhaopin AI job scrapers + SQLite analysis

- scrape_zhaopin_ai.py: lightweight no-login list scraper
- scrape_zhaopin_full.py: SQLite storage, resumable crawl, detail-page JD
- analyze_zhaopin.py: stats by city/salary/education/experience/skills
- scrape_zhipin_ai.py: BOSS Zhipin variant (login-based, fallback)
- gitignore scraper data artifacts and browser profile

.gitignore

@@ -6,3 +6,9 @@ build/
 .pytest_cache/
 .venv/
 firefox-source/
+# scraper runtime artifacts (examples/) — data outputs & browser profiles
+*.db
+zhaopin_*.json
+zhaopin_*.csv
+ai_jobs.csv
+examples/.zhipin_profile/