Refactor course page to be appropriate for instructors/students

[pconrad]

Currently, if a student goes to the "course page", they see a message like this one that just says "Student Features Coming Soon".

In this story, we will add some minimal features that we can build on later. We'll do it as a React component.

We'll call the React component, StudentCoursePage, and the first story will just add it to the storybook.

It should take a course object and a roster_student object as props, and display the following:

• Student First Name
• Student Last Name
• Student Id
• Email
• Enrolled (true or false)
• Section
• TA (true or false)
• Slack Id (as hyperlink to the slack, as on the instructor facing course roster page)
• GitHub id (as hyperlink)
• Org Status
• Teams

We will not show the consent field, since it is not populated while the course is in session.

A later story can add this react component into the student facing course page, which is in the file app/views/courses/_show_student.html.erb

User Stories

As a student

• I can see a student oriented course page
• So that I only see features that pertain to my needs.

ACs

• [x] There is a new react component
• [x] That component is in the storybook
• [x] There are fixtures for the course and for the roster student that work for that component