Introduce raw data container interface and data blocks implementation + use it in BF

[alonre24]

Describe the changes in the pull request

According to the index refactor as discussed - creating the generic interface for raw data key:value container that allows the basic CRUD operations over data items.

Create an implementation for this interface that uses a vector of data blocks, and uses it in BF index through the new abstraction layer.

TODO in next PR(s):

• Apply this in HNSW for the raw vectors' data
• Move the container to the base index struct

Mark if applicable

• [ ] This PR introduces API changes
• [ ] This PR introduces serialization changes

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 97.17%. Comparing base (27cfa7e) to head (f4603a1). Report is 1 commits behind head on main.

Additional details and impacted files

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##             main     #512   +/-   ##
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  Coverage   97.17%   97.17%           
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  Files          91       91           
  Lines        4858     4858           
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  Hits         4721     4721           
  Misses        137      137           

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