Add Hermes as a supported default coding agent

[PoorReno]

`omarchy default agent` and `omarchy agent` currently support a fixed list of
coding agents: pi, omp, opencode, claude, codex, grok, gemini, copilot, crush.

Could Hermes (https://github.com/NousResearch/Hermes-Agent) be added to that list?

It follows the same shape as the existing entries - a CLI coding agent that
could be installed via mise (similar to how `grok` maps to
`npm:@xai-official/grok` or `omp` maps to `github:can1357/oh-my-pi`) and
launched non-interactively from omarchy-agent.

Happy to help test/verify once support lands.

[wbecher]

I second that suggestion!

[wbecher]

I've used this prompt in hermes: I'm using omarchy, and it lets you select default AI agents, but Hermes isn't available as an option. Is there a way to extend this functionality and add Hermes?

And hermes did his magic, and worked: