Replace protractor with a different framework

[timvandenhof]

Protractor has been deprecated by the Angular team:
angular/protractor#5502

They will support it until Angular 15 and maybe we can consider migrating to Cypress as that is the most popular framework according to the linked issue.

[TheLe0]

@timvandenhof I think they already did that, on the /tests/ folder is already using Playwright that is a e2e testing too equivalent to Protractor and Cypress.

[timvandenhof]

I see that PR #38 indeed has been created. Did not remove the Protractor e2e though.