Feature Request: Matrix integration for notifications and real-time communication in Huly Chat

Summary

Add support for the Matrix protocol to enable real-time messaging and notifications directly from Huly. This would allow teams to receive updates on tasks, documents, mentions, and other events in Matrix rooms (e.g., via Element or other clients).

Motivation

Matrix is widely used in open-source and privacy-conscious teams. This integration would make Huly more accessible to communities already relying on Matrix for communication, reducing context-switching and improving response times.

Proposed Features

• Configuration: Allow users to set Matrix homeserver URL and access token in workspace settings.
• Project-to-room mapping: Link Huly projects or spaces to specific Matrix rooms.
• Event notifications:
  • Task created / assigned / updated / closed
  • Document changes
  • Mentions
• Rich messages: Use markdown formatting and optionally interactive buttons for quick actions.
• Bot commands (optional): Allow /huly new-task "Title" or /huly status TASK-123 directly from Matrix.
• E2E encryption (optional): Support end-to-end encryption via Matrix SDK.

Acceptance Criteria

• Settings UI to configure Matrix homeserver and token.
• Ability to map one or more Huly projects/spaces to Matrix rooms.
• Real-time notifications for key events (task changes, mentions, document edits).
• Documentation and example webhook payloads.

Additional Context

• Matrix JS SDK: matrix-js-sdk for Node/Browser.
• List of all supported Matrix SDKs: matrix-sdks