OAuth 2.1 Support

Problem/Motivation

A new version of the MCP specification was finalized on 2025.03.26 with an authentication framework supporting OAuth 2.1
For more information see the Changelog
The new Athorization document can be found here

Proposed resolution

Implement OAuth authentication

Remaining tasks

• Define a roadmap for implementation
• Implement authentication
• Implement tests
• Extend the module's documentation