Ensure consistent naming for model initialization methods

[Florian-crg]

Checked

• I searched existing ideas and did not find a similar one
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• I've clearly described the feature request and motivation for it

Feature request

The current method to abstract chat models is named init_chat_model. I would have expected a similar naming pattern for the method to abstract embedding models. However, in its beta version, it's called init_embeddings instead of init_embeddings_model.

Would it make sense to align the naming for consistency?

Motivation

The methods init_chat_model and init_embeddings serve a similar purpose: initializing models for chat and embeddings, respectively. However, their naming is inconsistent. The chat model function follows the pattern init_<type>_model, while the embeddings function omits _model.

Given their structural similarity, this inconsistency can be confusing for users who expect a uniform API. Renaming init_embeddings to init_embeddings_model would improve clarity, enhance discoverability, and create a more predictable experience for developers using LangChain.

Proposal (If applicable)

Renaming the init_embeddings to init_embeddings_model.