Pass options object to plugins

[abeforgit]

Allows host-app to pass options to plugins.
solves https://binnenland.atlassian.net/browse/GN-3106
fully backwards-compat

Usage

The @plugins argument to the rdfa-editor component now takes a list of either strings or objects.
If an object, the plugin name should be in the name field, and the options field (which can have any value) will be passed to the plugin's initialize method as a second argument. All other fields will be ignored.

e.g.:

template:

<RdfaEditor @plugins={this.plugins} />

template controller:

this.plugins = [
   "plugin-without-options", 
   { 
      name: "plugin-with-options",
      options: { /* anything you want */ }
    }
];

plugin:

initialize(controller: Controller, options: MyOptions) {
   if (options.tralala) {
      this.doWololo();
      }
  }

[nvdk]

looks good to me!