this small fix adds back the load_models.py script

- fixes broken setup.py in current dev
- it is just an alias for configure_invokeai.py
- preload_models.py will be deprecated, but for now
  it is a second alias

scripts/load_models.py

@@ -0,0 +1,12 @@
+#!/usr/bin/env python
+# Copyright (c) 2022 Lincoln D. Stein (https://github.com/lstein)
+# Before running stable-diffusion on an internet-isolated machine,
+# run this script from one with internet connectivity. The
+# two machines must share a common .cache directory.
+
+import warnings
+import configure_invokeai
+
+if __name__ == '__main__':
+    configure_invokeai.main()
+