FIXME: Check user premission have permission to approve ApproveRevision handles approving a course revision.

CreateNewCourse creates a new course with the given request data.

CreateNewRevision handles course content updates.

GetCourse handles get ccourse data (only module and step no step content).

GetCourseLandingPageData handles fetching the landing page details of a course.

GetStepContent handles get ccourse steps content data.

UpdateCourseLandingPage handles updating course landing page details.

UploadImage handles the image upload to S3 and saving the image metadata in the database.