Default EF

[tazarov]

A few goals:

• Exteremely simple to use
• Automatically downloads required shared libs and uses them without the need for the user to do anything extra
• Instructions on how to pre-download the libraries for offline/air-gaped systems
• Use the same model as Chroma, including its download location and extraction (co-located deployments of Python and chroma-go should work seamlessly)