Hermes Dashboard plugins get build guide

This is a practical tutorial more than a splashy launch, but it matters because it turns Hermes from a runnable agent into a customizable platform.

• –Hermes plugins are lightweight: a manifest plus a prebuilt JS bundle, with optional CSS and FastAPI routes
• –The dashboard SDK exposes React, UI primitives, and Hermes API helpers, which lowers the barrier to building useful extensions
• –The architecture supports custom tabs and backend endpoints without touching dashboard source, which is the real unlock for community ecosystem growth
• –The feature fits Hermes’ broader push toward modularity and self-hosted extensibility rather than a closed agent experience
• –For power users, this is the kind of surface area that makes a framework stick: once people can add their own tools, they start building around it