Add ComfyUI model installation guide (#2)

- Add ComfyUI model installation guide (e282c2578bff08f45afd2625e42398b0bb8a1255)
- Normalize README folder tree formatting (0523bed4440cfcd25419c83ff2241830b16dba86)

README.md

@@ -18,15 +18,15 @@ Original model repository: https://huggingface.co/jdopensource/JoyAI-Image-Edit-
 
 Place the files in the following folders:
 
-```
+```text
 📂 ComfyUI/
 ├── 📂 models/
 │   ├── 📂 diffusion_models/
-│   │   ├── joyai_image_edit_plus_bf16.safetensors
-│   │   └── joyai_image_edit_plus_int8_convrot.safetensors
+│   │   ├── joyai_image_edit_bf16.safetensors
+│   │   └── joyai_image_edit_int8_convrot.safetensors
 │   ├── 📂 text_encoders/
-│   │   ├── qwen3vl_8b_joyimage_edit_plus_bf16.safetensors
-│   │   └── qwen3vl_8b_joyimage_edit_plus_int8_convrot.safetensors
-|   └── 📂 vae/
-|       └── wan_2.1_vae.safetensors
+│   │   ├── qwen3vl_8b_joyimage_edit_bf16.safetensors
+│   │   └── qwen3vl_8b_joyimage_edit_int8_convrot.safetensors
+│   ├── 📂 vae/
+│   │   └── wan_2.1_vae.safetensors
 ```