Add FastEmbed JS support

[PylotLight]

Checked

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

Feature request

For free local embedding we should add support for fast embed:
https://github.com/Anush008/fastembed-js

This is already supported in langchain py, but we need js support as well.

Motivation

To be able to use fastembed embeddings locally which are vectorised into qdrant etc.

Proposal (If applicable)

No response