registry.json lists official plugins for Exbyte Depot. The client fetches it,
shows available plugins, and installs them into the user's local plugins folder.
Plugins marked "autoInstall": true are installed automatically on first run
(e.g. Unreal Engine Tools).
Each plugin lives under plugins/<id>/ (a plugin.json manifest + a JS entry).
See the app's PLUGINS.md for the SDK.