[MNT] Update similarity search with new base classes : Query Search

[baraline]

Reference Issues/PRs

Part of #1243

What does this implement/fix? Explain your changes.

As described in #1243, this is a first PR that implement base classes for query search task, and transfers the existing code under this new submodule.

Remaining TODOs:

• [ ] Adapt distance profile function for unequal length
• [ ] Add tests for unequal length for both dummy and top-k
• [ ] Fix missing docstrings
• [ ] Add typing to function/class parameters

PR checklist

For new estimators and functions

• [X] I've added the estimator to the online API documentation.
• [X] (OPTIONAL) I've added myself as a __maintainer__ at the top of relevant files and want to be contacted regarding its maintenance. Unmaintained files may be removed. This is for the full file, and you should not add yourself if you are just making minor changes or do not want to help maintain its contents.