Add documentation for cocktailpeanut's hermes-mod community tool —
a web UI for creating and managing Hermes skins visually. Covers
installation (Pinokio, npx, manual), usage walkthrough, and feature
overview including ASCII art generation from images.
Ref: https://github.com/cocktailpeanut/hermes-mod
- add code-derived reference pages for slash commands, tools, toolsets,
bundled skills, and official optional skills
- document the skin system and link visual theming separately from
conversational personality
- refresh quickstart, configuration, environment variable, and messaging
docs to match current provider, gateway, and browser behavior
- fix stale command, session, and Home Assistant configuration guidance