reqs https://github.com/TryGhost/Ghost/pull/15045
- accesses the Ember registry via the `GhostAdmin` global to grab the editor component url that Admin fetches from the config endpoint
- `ember-auto-import` does not allow dynamic imports unless it can see it's an absolute URL, to work around that we strip the `https://` part of the provided URL and manually include it in the template string so it's detectable as an absolute URL when building
- added redirect to posts screen if no editor url is provided in config
no issue
- initial set up ready for testing use of react components (specifically an editor component for this experiment) inside of Admin
- added `react-editor` route
- duplicated all editor screen files and updated route references where necessary
