* Add AWS Bedrock reasoning extraction middleware
- Add 'reasoning' tag to tagNameArray for broader reasoning support
- Add AWS Bedrock case with gpt-oss model-specific reasoning extraction
- Add openai-chat and openrouter cases to provider options switch
- Remove unused zod import
* Add OpenRouter provider support
Updates ai-core to version alpha.18 with OpenRouter integration and
improves provider ID resolution for OpenAI API hosts.