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

@@ -18,4 +18,4 @@ Place the files in the following folders:
 ├── 📂 models/
 │   ├── 📂 detection/
 │   │   └── mediapipe_face_fp32.safetensors
-```
+```