Oc-go-cc, an Open-source proxy that lets Claude Code use OSS models

⚠️ No breaking changes detected.

Summary
This release adds full support for AWS Bedrock as a provider, including Anthropic integration, configuration updates, and extensive documentation. It also fixes a serialization issue in chat messages and refines test and code quality across the codebase.

New Features

• Add AWS Bedrock provider with configuration and implementation.
• Enhance AWS Bedrock provider with Anthropic support and configuration options.
• Update AWS Bedrock provider documentation to include Anthropic Messages format support.
• Add AWS Bedrock provider documentation updates in README and CONFIGURATION.md.

Bug Fixes

• Fix chat message content serialization by using json.RawMessage for proper JSON handling.

Improvements

• Refactor AWS Bedrock provider test types for consistency.
• Update internal client opencode.go and config handling for better type safety.
• Streamline provider integration in server.go.

Documentation

• Expand CONFIGURATION.md and README with new provider details and examples.
• Add docs/architecture.md and docs/howto-add-model for developer guidance.
• Provide configs/config.example.json illustrating the new provider configuration.

Chores

• Update internal provider aws_bedrock.go and corresponding test files.
• Refactor internal/config/config.go and internal/client/opencode.go for maintainability.
• Adjust internal/server/server.go to incorporate the new provider.