Rename FFHQ reference batch: ref_zip_64_10000.npz -> ref_ffhq_64_10000.npz

Add FFHQ 64x64 FID reference batch

Add CelebA 32x32 FID reference batch

Add CIFAR-10 (EDM) FID reference batch

Add naive DiT-XL/4 ImageNet-64 (100k, FID 8.55) EMA weights

Add ss-DiT-S FFHQ (70k, FID 13.08) EMA weights

Add naive DiT-S FFHQ (70k, FID 14.22) EMA weights

Add ss-DiT-S CelebA (70k, FID 23.38) EMA weights

Add naive DiT-S CelebA (70k, FID 26.85) EMA weights

Add ss-DiT-S CIFAR-10 (70k, FID 8.63) EMA weights

Add naive DiT-S CIFAR-10 (70k, FID 11.08) EMA weights

Rename to <dataset>_ssdit / <dataset>_dit convention

Add ss-DiT XL/4 ImageNet-64 EMA weights (100k iters, FID 7.92)

initial commit