Jerry Liu

This PR makes a few key refactors to allow indices to be more extensible in the future (say, user-specified indices). - Removed query_map.py which hardcodes the mapping between an index...

we can do keyword filtering + similarity filtering here

- add very basic initial logger abstraction - store intermediate outputs during create/refine specifically - TODO: add for tree summarize, add for selecting nodes, add for building the index

Once this lands, we will bump up the minor version. Decouples node storage from storage of outer data structure. Allows nodes to be reused across indices, allows us to more...