Add SigLIP 2
Author: qubvel
Pull request: yes

# What does this PR do?

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Fixes #36318


## Before submitting
- [ ] This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
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## Who can review?

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Models:

- text models: @ArthurZucker
- vision models: @amyeroberts, @qubvel
- speech models: @ylacombe, @eustlb
- graph models: @clefourrier

Library:

- flax: @sanchit-gandhi
- generate: @zucchini-nlp (visual-language models) or @gante (all others)
- pipelines: @Rocketknight1
- tensorflow: @gante and @Rocketknight1
- tokenizers: @ArthurZucker
- trainer: @muellerzr and @SunMarc
- chat templates: @Rocketknight1

Integrations:

- deepspeed: HF Trainer/Accelerate: @muellerzr
- ray/raytune: @richardliaw, @amogkam
- Big Model Inference: @SunMarc
- quantization (bitsandbytes, autogpt): @SunMarc @MekkCyber

Documentation: @stevhliu

HF projects:

- accelerate: [different repo](https://github.com/huggingface/accelerate)
- datasets: [different repo](https://github.com/huggingface/datasets)
- diffusers: [different repo](https://github.com/huggingface/diffusers)
- rust tokenizers: [different repo](https://github.com/huggingface/tokenizers)

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Comments:
The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/transformers/pr_36323). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update.

Hi, it looks like the vocab file references a file on a private desktop: https://github.com/huggingface/transformers/blob/a957b7911a758d54597914b4479fe6e81424d64f/src/transformers/models/siglip/convert_siglip_to_hf.py#L137-L143

which may be related to https://github.com/huggingface/transformers/issues/36665

Hey @EricWiener, this is just a conversion script, it's used once to convert the model from JAX implementation to HF model format and upload it to the HF Hub, and conversion script not used somehow for further model inference