Rename CLI to 'hf' + reorganize syntax (#3229)
* Rename CLI to 'hf' + reorganize them
* fix test_command_delete_cache.py
* fix tests/test_utils_cache.py
* Update src/huggingface_hub/cli/__init__.py
Co-authored-by: Lysandre Debut <hi@lysand.re>
* Document hf instead of huggingface-cli everywhere
* Remove deprecated options
* fix tests
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Co-authored-by: Lysandre Debut <hi@lysand.re>
