Feat: Visual regression tests

[tuliomir]

Acceptance Criteria

• Depends on fix: Restore e2e tests #698
• Adds visual regression tests to the e2e tests

Notes

There are many frameworks that provide the visual regression functionalities. The chosen one was cypress-image-diff because:

• It requires no third party account or integration: no strings attached
• It's the simplest to set up: immediate return on effort

In a future moment we may decide that a full integration with a specialized third party is a better path and all we'll need to do to our code is to remove the cypress/visual-test folder, its configurations, and adapt the cy.compareSnapshot() command instances.

Security Checklist

• Make sure you do not include new dependencies in the project unless strictly necessary and do not include dev-dependencies as production ones. More dependencies increase the possibility of one of them being hijacked and affecting us.

[tuliomir]

Superseded by #736