[FEAT]: RAG for images files

[nannib]

What would you like to see?

I would like to suggest to allow to upload into RAG system, the JPG/PNG/etc. files, because if I use a multimodal embedder model I saw that it can manage file like mp4 or mp3, it can describe, reading from my RAG, the video end the audio. I think it could be useful to allow the embedding of images files too. My 2 cents ;-)