feature: Playwright

[vojtech-cerveny]

• basic flow how we can use playwright for basic tests of UI

• small changes (tweaks) of Login.js and how Electron handle externalUrl.

• Now I can call function handleIncomingUrl and return correct url (like tidepooluploader://localhost/keycloak-redirect#state....

      await window.evaluate((url) => {
        window.electron.handleIncomingUrl(url);
      }, href);

How to test:
Add these variables (qa2 personal account) into .env

E2E_USER_EMAIL=
E2E_USER_PASSWORD=

• yarn test:e2e --headed for visible Chrome
• yarn test:e2e

It is draft, please let me know what do you think about my changes.

[krystophv]

Would it be possible to do this work against the in-browser-merged branch? There are a lot of changes in that branch that will have conflicts with these changes if we were to merge into master, I'm pretty sure.

[vojtech-cerveny]

#1644 - new version pointed to in-browser-merged branch as it as requested.