Add Provider tab details

[josefaworks]

As a platform operator, I can click into the Provider tab to see a yaml file of how events are encoded and the webhook address where they are being sent 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 but should look the same for Provider