CHANGES:
- Introduce Microsoft 365 Copilot as a new AI vendor.
- Enable querying of Microsoft 365 data like emails, documents, and chats.
- Implement OAuth2 authentication for delegated user permissions.
- Support both synchronous and streaming responses from Copilot.
- Provide comprehensive setup instructions for Azure AD app registration.
- Detail licensing, technical, and permission requirements for Copilot.
- Add troubleshooting steps for common authentication and API errors.
- Document current API limitations and usage examples.
- Integrate Copilot into Fabric's setup process and model listing.
