Hermes v0.21.0, the Pantheon Release: a household of helpers gets faces, a phone line, and a memory

Hermes Agent v0.21.0 rolls the post-v0.20.0 patch window into one milestone: Bot Mode built into the desktop, hermes peer for bot-to-bot DMs across machines, cron jobs that remember their last run, and subagents you can steer mid-flight. What each one is for, how to wire it, and the hermes update path.