Hi. I deleted that page as it is definitely not a formal project of mediawiki. I'm not sure where would be most appropriate, but there are different places where you can propose/discuss ideas listed in the Communication page.
Topic on User talk:Ignacio SuperCheatBros/Flow
It was an Template:Essay ; there is no separate namespace for essays, so they have to go in the Project: namespace.
Yes, there's no separate namespace, but I don't see a need to put them in project: as a necessary conclusion from that. Perhaps I misunderstand what project: is for, but note that there are no other essays in the project space.