Add conversion for interleave llava

[zucchini-nlp]

What does this PR do?

Adds conversion script for the models proposed in this blog post.

Briefly: Llava-Next_Interleave is a series of models trained with interleaved visual inputs, including video and 3D images. Even though it's a lllava-next series, the authors have hardcoded the inference script to not use anyres technique, so I added it in LLaVa. We will not support video natively as LLaVaNeXTVideo, but user can pass each frame separately as if it's an interleaved image input

The main idea was to support the 0.5B checkpoint, because it has same performance as llava-next-7b in the blog post. Imo it can be a cool addition

[HuggingFaceDocBuilderDev]

The docs for this PR live here. All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update.

[amyeroberts]

Thanks for adding!

[NielsRogge]

Thanks for adding! Pretty cool that the conversion works out-of-the-box with SigLIP instead of CLIP as vision encoder.