[Integration]: Integrate with LlamaIndex's VectorStore

[chinaux]

Target Framework

LlamaIndex

Motivation

Provide the llamaindex community with a local way to use VectorStore, reducing the cost of embedding storage.

Required Interface

Impl llama_index.core.vector_stores.types.BasePydanticVectorStore.[add, query, delete]

Reference Implementations

No response

[chinaux]

PR has been submitted.
run-llama/llama_index#20595