tgpt 2.12.0

Changelog:

• Added multiple new providers - opencode, powerbrain, anyapi, litellm, minimax, ollamacloud.
• Removed providers which don't work.
• Added new image gen providers - magicstudio, anyapi
• Made fixes for some providers
• Fixed providers not using AI_API_KEY
• Added API key environment variables for all providers which use an API key
• Added config file support
• Fixed many bugs
• Added exa web search provider (works without API key)
• Added provider rotation support