Adding a ISSUE_TEMPLATE for the translation of docs
### Feature request

Users can create issues to translate the docs to several languages. This technique worked for the translation of [the course](https://github.com/huggingface/course/issues) (cc @lewtun).

Since we have [several docs to translate](https://github.com/huggingface/transformers/issues/15947) a template would be adequate. 

Currently, the [ISSUE TEMPLATES](https://github.com/huggingface/transformers/tree/main/.github/ISSUE_TEMPLATE) of the Transformers library are .yml. However, I would prefer to write a PR with a MD (similar to the [one in the Course](https://github.com/huggingface/course/blob/main/.github/ISSUE_TEMPLATE/translations.md)). We do not need to ask info from the issue writer, maybe a field to ask if they are willing to take leadership of the translation they are proposing.

### Motivation

Allowing the users to create their own issues (and possibly take ownership/leadership) would allow for a faster translation.

### Your contribution

If this is accepted I can create a PR with the issue template.
I closed the issue for the moment.<|||||>This issue was mentioned in a previous community issue #17404 for translating into Italian 🇮🇹.<|||||>This issue has been automatically marked as stale because it has not had recent activity. If you think this still needs to be addressed please comment on this thread.

Please note that issues that do not follow the [contributing guidelines](https://github.com/huggingface/transformers/blob/main/CONTRIBUTING.md) are likely to be ignored.