Add .model extension to default "extra" files downloaded with weights

When using the download-weights CLI command and specifying a single extension.

This is used for slow tokenizers which can be subsequently converted to fast tokenizers.

Author: njhill

server/text_generation_server/cli.py

@@ -66,7 +66,7 @@ def download_weights(
 ):
     from text_generation_server import utils
 
-    meta_exts = [".json", ".py", ".md"]
+    meta_exts = [".json", ".py", ".model", ".md"]
 
     extensions = extension.split(",")