Fix refactor face model path config

[ihmily]

Hey bro, The following code maybe has errors https://github.com/BennyKok/comfyui-deploy/blob/aea456cba9f500d6191e09e60f1c70238c5ef939/comfy-nodes/external_face_model.py#L70C13-L83C14

if face_model_save_name:
    existing_face_models = folder_paths.get_filename_list("reactor/faces")
    # Check if face_model_save_name exists in the list
    if face_model_save_name in existing_face_models:
        print(f"using face model: {face_model_save_name}")
        return (face_model_save_name,)
     else:
        face_model_save_name = str(uuid.uuid4()) + ".safetensors"
print(face_model_save_name)
print(folder_paths.folder_names_and_paths["reactor/faces"][0][0])
destination_path = os.path.join(
folder_paths.folder_names_and_paths["reactor/faces"][0][0],
face_model_save_name)

the path reactor/faces is not ComfyUI official path, so the code catch this error

  File "/root/autodl-tmp/ComfyUI/custom_nodes/comfyui-deploy/comfy-nodes/external_face_model.py", line 71, in <module>
    existing_face_models = folder_paths.get_filename_list("reactor/faces")
  File "/root/autodl-tmp/ComfyUI/folder_paths.py", line 228, in get_filename_list
    out = get_filename_list_(folder_name)
  File "/root/autodl-tmp/ComfyUI/folder_paths.py", line 195, in get_filename_list_
    folders = folder_names_and_paths[folder_name]
KeyError: 'reactor/faces'
File "/root/autodl-tmp/ComfyUI/custom_nodes/comfyui-deploy/comfy-nodes/external_face_model.py", line 79, in run
    print(folder_paths.folder_names_and_paths["reactor/faces"][0][0])
KeyError: 'reactor/faces'

related issues：#67

I fix it by register the path to the comfyui folder_paths and load the model list from the model path in advance to default_face_model_name value