test: add Cypress tests

[dvmichaelpeterseil]

Caleydo/coral#57

Developer Checklist (Definition of Done)

An initial cypress test has been added, replicating the functionality as seen in the Coral official demonstration video.

The test is functionally complete, however a second pass is preferable to add programmatic 'best practices' (i.e. add data-testid for most getters, etc.)

• 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

Screenshots

Additional notes for the reviewer(s)

Thanks for creating this pull request 🤗

[thinkh]

Obsolete with Caleydo/coral#64.