www/tgpt: Update 2.8.3 → 2.9.0
- Added providers: pollinations, deepseek, isou
- Added image generation provider: pollinations
- Added support for env variable AI_API_KEY
- Minor fixes and enhancements
ChangeLog:
https://github.com/aandrew-me/tgpt/releases/tag/v2.9.0
PR: 284504