DX improvement: Integrate TestRadar to help combat flaky tests

[BuckyMaler]

Hi 👋

I hope you don't mind me posting this here. I came across this post on X and thought Volto could benefit from TestRadar.

TestRadar is a GitHub App that automatically detects flaky tests, helps quickly debug your most disruptive tests, and increases productivity and cuts cost by automatically isolating flaky tests from your pipelines.

@PhilippeOberti and I built TestRadar because we've seen and felt first hand the frustration of PRs being blocked and releases being derailed by flaky tests. With TestRadar we aim to help teams eliminate flaky tests, regain trust in their test suite, and focus on what really matters — shipping. We currently support Cypress and Jest.

Let me know if you're interested.

P.S. I'd be willing to open the PR integrating TestRadar.