Add Tests for creating a new site, launching the editor, and editing a page

[perzeababa]

Scenario: Create a new site

Given I am on a terminal window
When following the Getting Started Guide for creating a new site
Then a new site should be created with the given details

Scenario: Launch the editor

Given I am on a terminal window
When following the getting started guide for launching the editor
Then the editor should load

Scenario: Edit a page

Given I am on the bodiless editor
When I Edit a page
And I make changes
And I save my changes
Then the changes should be applied to the page
And I should see a success message confirming the changes