add script working dir to convert script

convert_hf_to_gguf.py

@@ -11,6 +11,10 @@ from pathlib import Path
 
 import torch
 
+script_dir = os.path.dirname(os.path.abspath(__file__))
+if script_dir not in sys.path:
+    sys.path.append(script_dir)
+
 if 'NO_LOCAL_GGUF' not in os.environ:
     sys.path.insert(1, str(Path(__file__).parent / 'gguf-py'))
 import gguf