Refactor in several libs to make this smaller and easier to reason about

[rom1504]

Initially this repo was about integrating multiple small components into a simple retrieval system
it now growed a lot and got a lot more features
and it's becoming too big

to grow in a reasonable way, let's extract big components in smaller libs and use them here:

• clip inference
• clip back
• clip filter
• all-clip

should be independent libs

img2dataset and autofaiss are already independent

[rom1504]

Now even more important with clip client has it wouldn't need much dependencies at all if it was its own module

[dmarx]

i might tinker with this refactor