Engagement Index: Ready to Read In Student Data

Current State of Engagement Index: Split EI into 2 tables, User points displayed on top

Squashed Commits:
[no-jira] -- Fixed the styling per Christian's comments on the PR
[CYB-54] -- Included SASS syntax into styling
[CYB-83] - Added sharing and unsharing feature for students
[no-jira] - Added Landing Page, Modified JSON file, edited index
[no-jira] - In Progress: Split EI into 2 tables, User points displayed on top