This obviously has some level of Deno officialness. But from looking at the TODO-ridden state of the docs, it doesn't seem like it's ready for its '#1 on HN' public launch moment.
It has nothing to do with the official Deno project except for being hosted on Deno Deploy which gives you a <projectname>.deno.dev domain. I find deno.dev misleading in the sense that it gives any random project instant credibility.
Thank you. I actually realised/remembered about the domain and already edited my comment. But the author of the project is a Deno employee.
I totally assumed it was an official Deno launch until I read your comment. I think it's the combination of the domain and the Deno mascot that makes it misleading.
EDIT: oh, if it's made by a Deno employee that changes it.