Reranking

[20001LastOrder]

Description

Create the reranking capability for actions involving retrieval (BaseRetrieval actions). It can be activated by setting perform_reranking to true in the following actions

• GoogleSearch
• ArxivSearch
• ContextSearch

It can be used for any actions inheriting the BaseRetrievalAction class

Type of change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Maintenance
• New release

Related issues

Closes #362

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[Eyobyb]

we need to have a base embedding function class since some of them are not callable. For example, SentenceTransformerEmbeddings has embed_query instead of it self being callable.

[20001LastOrder]

I'm hoping to have an adapter for all of them so that we will not directly use the embedding from the langchain. But I think create a base embedding is a good idea.

[saminegash]

resolve conflict

[saminegash]

LGTM,