The unofficial 128x part in the Classic Faithful lineup, aiming to bring back the original painted look of Vattic's Faithful pack.
Important Note: Only version 1.19.2 is currently actively supported and actually have files in the branches, your GitHub is not broken and this is not a bug.
Find the version you are looking for, and from there follow the instructions below:
Unzip the file using any program like Winrar, 7zip, or Archive Utility. Sometimes GitHub has a bug where the folder that is created when decompressed has a second folder within it, breaking the structure. To solve this, simply drag the second folder inside the decompressed one into your resourcepacks folder. Sorry for the inconvenience.