Adds support for using models hosted on AWS Bedrock, specifically Anthropic Claude models.
Key changes:
- Added '@aws-sdk/client-bedrock-runtime' dependency.
- Updated constants, server config, and auth logic for Bedrock.
- Implemented backend API handler () to communicate with the Bedrock API, handling streaming and non-streaming responses, and formatting output to be OpenAI compatible.
- Updated dynamic API router () to dispatch requests to the Bedrock handler.
- Created frontend client () and updated client factory ().
- Updated with necessary Bedrock environment variables (AWS keys, region, enable flag) and an example for using to alias Bedrock models.