Support for models trained with SetFit for classification

### Feature request

How can we use embedding models trained under setFit for classification using infinity.

### Motivation

https://github.com/huggingface/setfit

is a good library that allows fine tuning of embedding models for downstream tasks. Infinity server being the one stop solution for embeddings, it will be good have it supported.

### Your contribution

NA

Start by reviewing Infinity's existing embedding-model serving path alongside the linked Hugging Face SetFit project. Define the supported SetFit classification workflow and its completion criteria before implementation; the issue names no files or tests.

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