refactor: remove dependency cycles to fix eslint errors

[thinkh]

Closes Caleydo/cohort#693

Requires Caleydo/coral#50

Developer Checklist (Definition of Done)

Issue

• All acceptance criteria from the issue are met
• Tested in latest Chrome/Firefox

UI/UX/Vis

• Requires UI/UX/Vis review
  • Reviewer(s) are notified (tag assignees)
  • Review has occurred (link to notes)
  • Feedback is included in this PR
  • Reviewer(s) approve of concept and design

Code

• Branch is up-to-date with the branch to be merged with, i.e., develop
• Code is cleaned up and formatted
• Unit tests are written (frontend/backend if applicable)
• Integration tests are written (if applicable)

PR

• Descriptive title for this pull request is provided (will be used for release notes later)
• Reviewer and assignees are defined
• Add type label (e.g., bug, feature) to this pull request
• Add release label (e.g., release: minor) to this PR following semver
• The PR is connected to the corresponding issue (via Closes #...)
• Summary of changes is written

Summary of changes

• Remove yarn.lock
• Add missing canvas-confetti dependency
• Remove || true to show eslint errors
• Rename App to Coral
• Remove content of index.ts

Screenshots

Additional notes for the reviewer(s)

---

Thanks for creating this pull request 🤗