[Feat] Add LiteLLMEmbeddings - Support SemanticChunking through LiteLLM #154
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added litellm support to identify and embed with any Huggingface embedding model that has feature extraction
added the same to the registry to support AutoEmbeddings.
added tests for the same.
key things to notice:
timeout is dependent on model size, since the model needs to be loaded onto the local hardware first.
context length, dimensions, and such measures are dependent on the model
token_counter is a callable from litellm, which would also need time to load.
currently only supports huggingface models. Litellm can support more models such as voyage, mistral, etc, but the API keys should be given in parameters.