[FEATURE] Support Hybrid Search in Java Client

[yudhiesh]

Is your feature request related to a problem?

A clear and concise description of what the problem is, e.g. I'm always frustrated when [...].
I noticed that the Java Client does not have a way to perform a Hybrid Query leveraging Exact Keyword Search and Semantic Search as per the documentation here. I don't mind working on this feature.

What solution would you like?

A clear and concise description of what you want to happen.
A method for hybrid() within the QueryBuilder class where we pass a List of Queries to run:

List<Query> queries = new ArrayList<>();
NeuralQuery neuralQuery = new NeuralQuery.Builder().build();
MatchQuery matchQuery = new MatchQuery.Builder().build();
queries.add(neuralQuery);
queries.add(matchQuery);
Query query = new Query.Builder()
                    .hybrid(queries)
                    .build();

What alternatives have you considered?

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Do you have any additional context?

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[dblock]

@yudhiesh thanks for raising this, please do contribute!

[yudhiesh]

@yudhiesh thanks for raising this, please do contribute!

Would love to, any guides on how I can contribute to the codebase for this?

[dblock]

I don't have anything specific, would dig through recent PRs for adding query builders.

[VachaShah]

@yudhiesh This feature is now released in 2.9.0 of the java client via PR #850. Please reopen this issue if there are any issues. Thanks!