Course details page

[lyangji1011]

Summary

Resolves #397

Checklist

• Add a new field in the context that determines if we are on the calendar page, the course details page (general), or the course details page for a selected class (it should keep a record of that class).
• Where the schedule is displayed right now, add a new View Mode button above with the Calendar and Course Details option. You can use the TabBar component for this. This will alter the context field you added.
• Create the empty course details page that displays if there are no courses in the left side panel.
• Create the CourseDetailsContainer that takes in no props and displays all the different CourseInfoCards for all classes in the schedule context.
• Make the SectionDetailsContainer that uses whatever selected class in the context to display the following using a Breadcrumb and the ClassInfo.
• Add the info icon to the class in the left panel
• Create all the flows and all the functionalities/tab switching by updating the new context field on whatever actions.

How to Test