This is just a library mod that can do structure work for me, though it might have a couple of other features.
For devs:
This mod can create structures with 1 line of code in the custom event. Simply register an event handler, and call register with a CustomStructure object! This mod will take care of the registration, configured feature (only no feature config supported ATM), setting up spacing, and other such things so that the structure will generate in your world. You still need to provide the template pool and structure nbt in the namespace you provided on registration.
source code and better instructions for use will be on GitHub soon.