Packaging non resource folders in build?

I have tried to find information on this but not finding much.

I currently have some assets within the resources directory, stuff which is fairly static and doesn't change often like models and textures etc, however there are some configuration elements which are not in the resources file, like xml files and some other things. Do I just manually add these to the build package, or is there some best practise for this.

The main logic was that we could change the games behaviour without needing a re-build we could just change some files outside of the packaged and bundled resources.