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Management
In the Admin back-office a "Plugin" entry list all the available plugins. Each plugin may be activated or deactivated. Each plugin can be configured from this interface. this interface also allows for localizing plugins, extracting them as a zip file, and updating them with a new version.
Packaging
Plugins may be deployed
using the with standard NAR installation
directly via the Plugin interface in the Admin back-office.
by moving directly the folder containing your plugin in the _san/_perso/_plugin directory if you have access to it, and ask the Admin Plugin interface to rescan the _plugins directory to see it appear in the plugins list
Plugins don’t come with a datamodel : if your plugin depend on a object and values you should bundle it as a .NAR file that contains the plugin and the associated objects and values.