Allow hermes messaging

[OisinKyne]

Diffing [all] against [web,messaging], here are the
extras you'd be adding. Grouped by likely usefulness
for obol-stack:

Probably worth turning on

• mcp — Model Context Protocol client; lets Hermes
  consume MCP servers
• pty — ptyprocess for better terminal subprocess
  handling
• cli — simple-term-menu for interactive menus in
  hermes CLI
• acp — agent-client-protocol (the hermes-acp
  entrypoint)
• google — Gmail/Calendar/Drive/Sheets/Docs (used by
  the google-workspace skill)