Add changes for uroman package to handle non-Roman characters
Author: nandwalritik
Pull request: yes

# What does this PR do?

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Fixes #32387


## 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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@sanchit-gandhi @ylacombe 

I have added the change for using `uroman` as optional dependency, just want to know if it's correctly implemented.
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Comments:
> Super first draft @nandwalritik! It's very close to being ready 🤗
> 
> My only issue with the PR is regarding backwards compatibility (explained below). Otherwise, my only request is slightly more verbose installation instructions in the docs.
> 
> Other than that, the PR looks great!

Just one doubt here, when I was installing uroman, It requires python version `>=3.10`.
Do we need to mention it somewhere?

Feel free to request a final review directly from `@ArthurZucker` when the last changes have been made @nandwalritik :)

Hi @ArthurZucker can you give a final review to the PR, already updated docs as per sanchit's inputs for backward compatibility.

The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/transformers/pr_32404). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update.