Normalize README metadata and formatting

Normalize model-card metadata and README formatting across Comfy-Org: use a consistent key and tag order, add upstream/base-model metadata where applicable, normalize code fences, remove redundant separators, and ensure a final newline.

README.md

@@ -29,4 +29,4 @@ Place the files in the following folders:
 │   │   ├── wan2.2_bernini_r_low_noise_fp8_scaled.safetensors
 │   │   ├── wan2.2_bernini_r_low_noise_int8_convrot.safetensors
 │   │   └── wan2.2_bernini_r_low_noise_mxfp8.safetensors
-```
+```