[Task] Support NEAR AI launch / documentation

- Implement feedback: https://github.com/nearai/docs/pull/3
- Updated branding: https://github.com/nearai/docs/pull/4
- Embed API Ref: https://github.com/nearai/docs/pull/5
- OpenAI SDK Suggestions: https://github.com/nearai/docs/pull/9
- Add README: https://github.com/nearai/docs/pull/10