Add version cli command

[010kim]

Below is the list of descriptions for this PR.

This PR is related to #2441

1. added version.py file

• This file is the implementation of the "huggingface-cli version" command which prints the version of the installed huggingface_hub package.

2. updated huggingface_cli.py file

• added VersionCommand which is implemented in the file shown above.

[010kim]

@Wauplin Hello! I implemented to the feature suggested by @remyleone from #2441. Could you check? Thank you in advance.

[HuggingFaceDocBuilderDev]

The docs for this PR live here. All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update.

[hanouticelina]

Hello @010kim, thank you for this PR ! I let few minor comments, otherwise everything looks good to me :)

[010kim]

@hanouticelina Thank you so much for reviewing the PR. I fixed the typo and the variable name you mentioned. Could you check again? Thank you in advance.

[hanouticelina]

Hello @010kim, thank you for this contribution, we are good to merge now!
cc @Wauplin

[Wauplin]

Thanks @010kim! LGTM now :)

@hanouticelina I let you merge it once reviewed

[Wauplin]

Ahah, concurrent reviews ^^