forked from 1b-agent/opencadstudio-upstream
Read-only inventory of the add-ons compiled into the build — name, version, id, API level, description, command prefixes — built from the extracted `ocs_plugin_api` manifest. Opened with the `PLUGINS` / `PLUGINMANAGER` command or the Start-page "Plugins" button. Adds `installed_manifests()` to the plugin registry and wires the window the same way as the existing About / Shortcuts windows. Part of #100 (phase-1 plugin manager UI stub). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>