Add Unlimited OCR
Author: guarin
Pull request: yes
Labels: name: New model

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# What does this PR do?

WIP branch to add Unlimited OCR: https://huggingface.co/baidu/Unlimited-OCR

Hub repo PR to update files: https://huggingface.co/baidu/Unlimited-OCR/discussions/13/files

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Comments:
The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/transformers/pr_46836). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update.

Thanks for all the reviews ❤️  I think this is ready for another round of feedback :)

Also opened a PR to the hub: https://huggingface.co/baidu/Unlimited-OCR/discussions/13/files
Tried to keep changes to a minimum. 

**[For maintainers]** Suggested jobs to run (before merge)

run-slow: auto, deepseek_ocr2, unlimited_ocr

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### CI recap

**Dashboard:** [View test results in Grafana](https://transformers-ci.lor-e.huggingface.cool/d/pytest-observability-by-pr/pytest-observability-branch?var-pr=46836)
**Latest run:** [29075374910:1](https://github.com/huggingface/transformers/actions/runs/29077378207)
**Result:** `failure` | **Jobs:** 15 | **Tests:** 171,121 | **Failures:** 62 | **Duration:** 18h 42m

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