[DOC] Add examples for QuerySearch in SimilaritySearch

[TonyBagnall]

Describe the issue linked to the documentation

just having a play with similarity search, some examples in the docstring would be helpful.

Suggest a potential alternative/fix

No response

[baraline]

Nice spot, missed it ! I recommend the notebooks in the meantime.

[kevinzb56]

@baraline is this issue still open?

[baraline]

Hi, the issue will be made irrelevant one #2473 is done, as QuerySearch estimator will be removed. I'll probably create a bunch of good first issues afterward to fill the gaps with what I won't cover in the PR. Thanks for your interest !