The file was mostly zipped for the convenience of uploading. In the original there is no 'GoldenResourcePack - Copy' so sorry about that. I'm currently unsure of what files are needed since it's currently a WIP.
I did get a response back elsewhere that the file structure for 1.20+ is different with sprites having their own individual folders but the folder I copied from my Minecraft didn't. I probably copied the wrong version.