This PR adds:

• bug-report.yml - an issue form for bug reports (will likely need to be extended/changed as new clients are added; for now it is very Python-centric)
• feature-request.yml - an issue form for feature requests
• config.yml - additional links that people will see when clicking on "New Issue" - see https://github.com/huggingface/huggingface_hub/issues -> New Issue for an example

The .yml files and directory structure follow the issue form syntax/structure described here https://docs.github.com/en/communities/using-templates-to-encourage-useful-issues-and-pull-requests/syntax-for-issue-forms

A lot of this was lifted from the way the huggingface_hub repository structures these templates - see here: https://github.com/huggingface/huggingface_hub/tree/main/.github/ISSUE_TEMPLATE - and then modified for some of the more common things we ask (machine info; HF_XET envvars, etc)

This symmetry between huggingface_hub and this repo was intentional so community members aren't started by a completely different format for providing information when opening an issue/asking for a feature.