Remove dlib dependency and make face alignment optional

requirements.txt

@@ -19,4 +19,3 @@ torch
 torchvision
 clip @ git+https://github.com/openai/CLIP.git@a1d071733d7111c9c014f024669f959182114e33
 spaces>=0.28.3
-dlib

runners/simple_runner.py

@@ -63,8 +63,11 @@ def extract_mask(image_path, save_dir_path, trash=0.995):
 
 
 def run_alignment(image_path):
-  import dlib
-  from scripts.align_all_parallel import align_face
+  try:
+    import dlib
+    from scripts.align_all_parallel import align_face
+  except ImportError:
+    raise ImportError("dlib is required for face alignment. Please install dlib or disable face alignment.")
 
   predictor = dlib.shape_predictor("pretrained_models/shape_predictor_68_face_landmarks.dat")
   aligned_image, unalign_dict = align_face(filepath=image_path, predictor=predictor)