no issue
- allows specifying Koenig-specific card options via `createComponentCard`
- respect `hasEditMode` and `selectAfterInsert` options when inserting cards via the (+) and / menus
- do not select divider card after insertion
refs https://github.com/TryGhost/Ghost/issues/9311
- use a similar approach as used in `ember-mobiledoc-editor` to render a div into the editor canvas then use Ember's `{{-in-element}}` helper as a wormhole to render an ember component card into the new div
- adds a `createComponentCard` util for setting up the necessary rendering boilerplate for Ember component cards
