First-class MiniMax Code agent recognition

[hetaoBackend]

MiniMax Code is becoming a public npm coding-agent CLI as @minimax-ai/code, with the interactive command mcode.

We would like people running parallel MiniMax Code sessions in Herdr to see them as agents with accurate working, blocked, and idle states, just like the other supported terminal agents. Today an mcode pane remains a generic terminal, so it misses Herdr's agent overview and notifications.

Would first-class MiniMax Code recognition fit Herdr's direction? MiniMax Code owns its run, permission, and questionnaire lifecycle, and we can provide representative cross-platform process details and terminal-state captures if that would help evaluate support.

[hetaoBackend]

Contributor intent: if the maintainers confirm that this fits Herdr and point me to the preferred recognition seam, I plan to submit the implementation from hetaoBackend. I will wait for that approval before opening an issue or pull request.