Changelog:
Added halfvec type
Added sparsevec type
Added support for indexing bit type
Added support for indexing L1 distance with HNSW
Added binary_quantize function
Added hamming_distance function
Added jaccard_distance function
Added l2_normalize function
Added subvector function
Added concatenate operator for vectors
Added CPU dispatching for distance functions on Linux x86-64
Updated comparison operators to support vectors with different dimensions
Sponsored by: P. Variablis GmbH
Torsten Zuehlsdorff
2adc60ebcc