[Feature Request]: Support sparse vector

[JinHai-CN]

Is there an existing issue for the same feature request?

• I have checked the existing issues.

Describe the feature you'd like

At present, our system uses a dense representation for vector storage. I would like to propose a feature request for the implementation of a sparse vector index within infinity. Sparse vector indexing is crucial for efficiently handling high-dimensional data, which is common in our use cases involving natural language processing and machine learning.