Add Event tab details

[josefaworks]

As a platform operator, I can click into the Event tab to see the K8s event of what information a report of an event issued by a controller should contain so that I can make sure the notification is configured correctly Figma Link:https://www.figma.com/file/IVHnM9iyeFWpd11evtY8ux/Weave-GitOps?node-id=4908%3A9125 Note: screenshot is of alerts tab, but should look the same for Events