Better integration of singletons into structure

[flayks]

I had a look and did setup a project with the new v3 Studio which looks very neat, fast (partially thanks to Vite 🙏) and much more powerful I feel. Good job on that 👏

One thing I was wondering about is if the concept of singletons would be more integrated? without having to update too much of the structure-which could be overwhelming to edit sometimes?

A nice way could be somehow to specify on the schema of a singleton a repeatable type, such as "singleton" or "post". That way, it could then just appear on the default structure as one element or a list of items.
From experience, Prismic does that quite nicely and this avoids to have to dig too much into the config side.