Add token and git credentials to login cli command

[silvanocerza]

As of now it's not possible to login in a non interactive shell using huggingface-cli login as it always prompt to input the token. This makes it hard to use the CLI for automation, for example in GitHub Actions.

This PR adds --token and --add-to-git-credential args to huggingface-cli login command.

$ huggingface-cli login --help
usage: huggingface-cli <command> [<args>] login [-h] [--token TOKEN] [--add-to-git-credential]

options:
  -h, --help            show this help message and exit
  --token TOKEN         Token generated from https://huggingface.co/settings/tokens
  --add-to-git-credential
                        Optional: Save token to git credential helper.

Example call:

$ huggingface-cli login --token $HUGGING_FACE_TOKEN --add-to-git-credential

[Wauplin]

Nice PR @silvanocerza , thank you for your help!
I made some cosmetic changes but otherwise I think we are good to merge it as soon as the CI is green.

[HuggingFaceDocBuilderDev]

The documentation is not available anymore as the PR was closed or merged.

[Wauplin]

And it's merged! Thanks for this contribution @silvanocerza. Clean and quick! :)

[julien-c]

thanks a lot @silvanocerza!