Add Hermes Connector ability

[Bradymck]

Summary

• Adds community/hermes-connector/ — routes voice/chat requests from an OpenHome ability directly to a self-hosted Hermes agent's OpenAI-compatible API server (POST /v1/chat/completions), then speaks the response back.
• No local bridge process needed at runtime — just two ability secrets (hermes_api_url, hermes_api_key).
• README is written in plain, simple English with numbered setup steps, aimed at non-native English speakers.

Test plan

• Deployed and tested live end-to-end against a real OpenHome DevKit + a self-hosted Hermes instance (exposed via Tailscale Funnel) — confirmed voice trigger → Hermes response → spoken back.
• Validated with openhome validate locally before submitting.
• get_api_keys() return value defensively normalized (handles both string and dict shapes seen in testing).

[github-actions]

🔀 Branch Merge Check

PR direction: add-hermes-connector → dev

✅ Passed — add-hermes-connector → dev is a valid merge direction

[github-actions]

✅ Community PR Path Check — Passed

All changed files are inside the community/ folder. Looks good!

[github-actions]

🔍 Lint Results

🔧 Formatting fixes available

This PR is from a fork, so fixes could not be pushed automatically. Download the python-lint-results artifact from the workflow run for the patch file, then run:

git apply autofix.patch

✅ __init__.py — Empty as expected

Files linted: community/hermes-connector/main.py

✅ Flake8 — Passed

✅ All checks passed!

[github-actions]

✅ Ability Validation Passed

📋 Validating: community/hermes-connector
  ✅ All checks passed!