Implementation of CustomStrategy for LanceDB and Qdrant

[timonv]

Is your feature request related to a problem? Please describe.
@shamb0 recently added a custom search strategy that makes it possible for users to generate a custom query, using the providers query builder, to easily customize queries for retrievers.

Still needs to be implemented for other providers, lancedb and qdrant.

Describe the solution you'd like
Qdrant has a straightforward query builder. Lance however has a query builder that is bound to the table. A Retrieve implementation similar to PGVector for the strategy would be the way to go.

See https://github.com/bosun-ai/swiftide/blob/master/swiftide-core/src/search_strategies/custom_strategy.rs