Include a document in a dictionary app

Rhina suggested I change the category of my post below to “Feature Request”, and I don’t see any way to change the category, so I am repeating it here:
I see that with the Scripture App Builder, it is possible to include document files along with the other files to be included in the app. It would be nice to have this capability with Dictionary App Builder, too, so that an introduction to the dictionary could be included in the app.