[ENH] IndexSearch class with attimo or LL algorithm

[baraline]

Describe the feature or idea you want to propose

Implement the IndexSearch class for similarity search. I use the following as a paper trail of which hash/index method could be used as a first use case for this class :

• attimo
• LL
• https://drops.dagstuhl.de/storage/00lipics/lipics-vol077-socg2017/LIPIcs.SoCG.2017.37/LIPIcs.SoCG.2017.37.pdf (similar to LL ?)

Describe your proposed solution

For the IndexSearch class, we will use the BaseSimilaritySearch class to provide a common interface with QuerySearch and SeriesSearch class.

Following papers above, the following code base exists and could serve as a base for implementation :

• attimo
• LL

Describe alternatives you've considered, if relevant

No response

Additional context

The choice of wether to go for altimo or LL will depend on how complex it is to implement them, as I'd prefer to go with something simple for the first IndexSearch case.