feat(python): add local cross-encoder reranker support

[Hendrixx-RE]

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Description

I'm working on adding the cross-encoder option and have made the changes to the python sdk.
So far,Ive added a new QueryOptions class and removed the import from the precompiled rust core to add the flag and the top-k meathod.
This is still a work in progress as I have to:
-Update the JS sdk
-Update the elixir sdk
-Documentation
-Tests

Fixes #416

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

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All committers have signed the CLA.

[cubic-dev-ai]

All reported issues were addressed

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[Hendrixx-RE]

@HarshaNalluru if this is indeed the intended output,then Ill implement it on the js sdk also and wrap it up with tests and documentation