Actual mod is in the romfs folder.
If you just want this repo as a TotK mod, delete everything but the romfs folder, and then drag the folder over TKMM to install it, or install it in your emulator of choice.
In the plaintext folder is a .rstbl.yml file that is the contents of the .byml.zs (Binary YAML, compressed with ZStandard, editable with NxEditor).
Modifies the romfs/RSDB/PouchActorInfo.Product.111.rstbl.byml.zs game file.