Adds fetching of remote models from the server

Note: requires version 1.8.* of the iOS app for remote models to be pulled.

• add support for server-side defined models to download for remote
• total of 18 new models added for users to use with the server
• fixed issue where incorrect cased quantized files were not found in huggingface
• failure to identify a remote model does not cause an error to the app, but instead an error log