HuggingFace integration

[pranayasinghcsmpl]

Fixes #727

Proposed Changes

• Add a new option for huggingface in the cli
• Add model upload functionality to a huggingface repo
• Add model download functionality from a huggingface repo

Checklist

• [ ] CONTRIBUTING guide has been followed.
• [ ] PR is based on the current GaNDLF master .
• [ ] Non-breaking change (does not break existing functionality): provide as many details as possible for any breaking change.
• [ ] Function/class source code documentation added/updated (ensure typing is used to provide type hints, including and not limited to using Optional if a variable has a pre-defined value).
• [ ] Code has been blacked for style consistency and linting.
• [ ] If applicable, version information has been updated in GANDLF/version.py.
• [ ] If adding a git submodule, add to list of exceptions for black styling in pyproject.toml file.
• [ ] Usage documentation has been updated, if appropriate.
• [ ] Tests added or modified to cover the changes; if coverage is reduced, please give explanation.
• [ ] If customized dependency installation is required (i.e., a separate pip install step is needed for PR to be functional), please ensure it is reflected in all the files that control the CI, namely: python-test.yml, and all docker files [1,2,3].

[github-actions[bot]]

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3 out of 4 committers have signed the MLCommons CLA.
:white_check_mark: @sarthakpati
:white_check_mark: @szmazurek
:white_check_mark: @Geeks-Sid
:x: @pranayasinghcsmpl
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