Setup incident response and status page for OONI related resources

[hellais]

We should have a page and archive of known incidents so we can inform our community and coordinate within our team to troubleshoot and address them.

[hellais]

Things I am looking at:

• https://instatus.com/
• https://betterstack.com/
• https://status.io/

[hellais]

We now have: https://ooni.instatus.com/. I am closing this as done.