Add emu3 support to the transformers backend

[mudler]

Is your feature request related to a problem? Please describe.

https://github.com/baaivision/Emu3

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[siddimore]

@mudler if you have some context to provide on the integration of this i could look into adding this

[mudler]

@mudler if you have some context to provide on the integration of this i could look into adding this

that'd be great! As now emu3 seems to be working directly with transformers it would not need an entire backend from scratch, but actually adapting the existing transformers one to support how to run emu3 models (see https://github.com/baaivision/Emu3?tab=readme-ov-file#quickstart for example). The transformer backend is here https://github.com/mudler/LocalAI/tree/master/backend/python/transformers