Module pluginExperimental

@honua/sdk-js/plugin — versioned plugin manifests and deterministic, data-only certification reports and an explicit application-local runtime.

This entrypoint validates declarations before any extension code runs. It does not load entrypoints or grant ambient authority. Applications import plugin factories explicitly and inject only reviewed host services into an instance-scoped HonuaPluginRegistry.

This surface still stabilizes the plugin API before 1.0 and may change; the behavioral-conformance kit, signed reports, and support-status program from issue #392 are included here.