feat: add hermes-agent

[DavidMetcalfe]

Summary

Adds Hermes Agent to the ACP registry.

About Hermes Agent

Hermes Agent is a self-improving AI agent by Nous Research. It features:

• Native ACP support via the acp_adapter module (entry point: hermes-acp)
• Terminal Auth — interactive --setup flow for first-time provider configuration
• Agent Auth — uses configured runtime credentials (OpenRouter, OpenAI, etc.)
• Multi-provider model support (OpenRouter, OpenAI, Anthropic, local endpoints, and 20+ others)
• Cross-platform: Linux, macOS, Windows, Termux
• Self-improving skills, memory, subagent delegation, scheduled automations

Distribution

• PyPI: hermes-agent[acp] (includes agent-client-protocol dependency)
• Entry point: hermes-acp (runs the ACP adapter server over stdio)
• Version: 0.19.0 (auto-updates from PyPI)

Authentication

Hermes supports both required auth methods:

1. Agent Auth — when provider credentials are configured, advertises the resolved provider (e.g., openrouter) as an agent-managed auth method
2. Terminal Auth — always advertised as hermes-setup with args: ["--setup"], launches interactive model/provider setup

Files

• hermes-agent/agent.json — registry entry
• hermes-agent/icon.svg — 16x16 monochrome icon

Closes NousResearch/hermes-agent#9111