- Replace axios with Node.js native fetch API for HTTP requests
- Update HttpClient to use fetch instead of axios instance
- Convert axios-specific error handling to fetch-based error mapping
- Update response type handling for streams, JSON, text, etc.
- Remove axios from package.json dependencies
- Update all test files to mock fetch instead of axios
This change reduces external dependencies and uses the built-in
fetch API available in Node.js 18+, which is already the minimum
required version for this SDK.
