Support GPT 3.5 and support Redeem feature

What's Changed

• Implement pgsql by @kkdai in #28
• update name to pgsql by @kkdai in #29
• Add PGSQL setting in doc by @kkdai in #30
• add draft redeem and checking by @kkdai in #33
• add toggle and more check by @kkdai in #34
• Change to public ID by @kkdai in #35
• Add Feature toggle func by @kkdai in #36
• Upgrade to GPT-3.5 Turbo model and latest Chat API by @Xanonymous-GitHub in #37

New Contributors

• @Xanonymous-GitHub made their first contribution in #37

Full Changelog: v0.5.0...v0.6.0