These are the only formats allowed AFAIK.

You do have to change you project indeed. But as long as you do not move the files around that should only be a small change.

The reason it is like that is because the source data (aka 'the files') can be used in several projects, the project is not the owner of the data.

What you could try is to package everything in a wheel or something similar.

I do a similar thing with configuration files in a jar.