hermes - 💡(How to fix) Fix Roadmap: make plugins installable, inspectable apps

Summary

Make Hermes plugins feel like installable apps with permissions, settings, health checks, and compatibility metadata.

Proposed scope

• Extend plugin manifests with declared permissions for tools, filesystem paths, env vars, and network domains.
• Add plugin settings schemas that can be rendered in setup and dashboard surfaces.
• Add plugin health checks and diagnostics.
• Define install, update, remove, and compatibility metadata for a plugin index/marketplace flow.
• Explore sandboxing or trust levels for third-party plugins.

Acceptance criteria

• Plugin capabilities are visible before activation.
• Plugin configuration and health can be inspected without reading plugin source.
• Incompatible or unhealthy plugins fail clearly and non-destructively.