Spring-ai Add Sbert, local, EmbeddingClient impl

EmbeddingClient implementation that computes, locally, sentence embeddings with SBERT transformers. It can use any pre-trained sbert model, serialized into Open Neural Network Exchange (ONNX) format. The Deep Java Library and the Microsoft ONNX Java Runtime libraries are used to run the ONNX models and compute the embeddings.

Comment From: tzolov

Replaced by: https://github.com/spring-projects-experimental/spring-ai/pull/70