v0.12.0

Changelog

• a537dd8 chore(release): v0.12.0 changelog
• 7670332 feat: PDF text extraction for scrape, search, and crawl (#19)
• 1948391 feat: PDF text extraction for scrape, search, and crawl (#19)
• e5c1194 feat: authenticated scraping via Netscape cookie file (#25)
• 87d42c9 feat: multiple API keys per provider (#23) + random provider selection (#24)
• a2e0e35 feat: multiple API keys per provider (#23) + random provider selection (#24)
• 9611112 refactor: rename research.md to ketch-research.md (#22)