* Adds support for stella_en_v5 embedding model -400M variant
* Unified stella
* WIP: Unified Stella
* Combined stella for both 1.5B and 400M variants
* Cargo fmt for the CI
* removed redundant stella-400m model and example after merge into stella-en-v5
* cargo fmt --all
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Co-authored-by: Anubhab Bandyopadhyay <4890833+AnubhabB@users.noreply.github.com>
Co-authored-by: laurent <laurent.mazare@gmail.com>