Frontend component for the Course page

[payamnj]

A react component to load list of course content summary in a table in the order of course content priority and providing features to:

• Add new course content (component forms for Lesson and Quiz should be reusable for edit)
• Editing a course content from the table
• Deleting a course content from the table (in case of enabled course should show error message, recommend publishing the content instead)
• Changing the priority of the course content (preferably with a dragging rows in the table but initially can be implemented in other ways if the dragging implementation is complicated)
• Switch button to publish/unpublish course content from the table
• title of each course content should be linked to the preview page