Add list_repo_commits to list git history of a repo

[Wauplin]

FIX #1288 (following server-side implementation -internal link- thanks @Kakulukian).

This PR adds a new helper list_repo_commits (similar to list_repo_refs and list_repo_files`). It lists the all history of a repository on the Hub for a given revision. Commits are sorted by date (last commit first).

@camenduru this will finally solve your problem on "how to create an empty branch?". I did not make a special parameter in create_branch that would use list_repo_commits under the hood as I thought it was a quite specific use case.

>>> from huggingface_hub import HfApi
>>> api = HfApi()

# Get initial commit on a repo
>>> initial_commit = api.list_repo_commits("gpt2")[-1]

# Initial commit is always a system commit containing the `.gitattributes` file.
>>> initial_commit
GitCommitInfo(
    commit_id='9b865efde13a30c13e0a33e536cf3e4a5a9d71d8',
    authors=['system'],
    created_at=datetime.datetime(2019, 2, 18, 10, 36, 15, tzinfo=datetime.timezone.utc),
    title='initial commit',
    message='',
    formatted_title=None,
    formatted_message=None
)

# Create an "empty branch" by deriving from initial commit (branch is not entirely empty, `.gitattributes` is still there :) )
>>> api.create_branch("gpt2", "new_empty_branch", revision=initial_commit.commit_id)

[HuggingFaceDocBuilderDev]

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

[julien-c]

really cool!

[codecov]

Codecov Report

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Patch coverage: 100.00% of modified lines in pull request are covered.

❗ Current head 837297a differs from pull request most recent head e17ffa2. Consider uploading reports for the commit e17ffa2 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1331   +/-   ##
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  Coverage        ?   83.83%           
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  Files           ?       47           
  Lines           ?     4727           
  Branches        ?        0           
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  Hits            ?     3963           
  Misses          ?      764           
  Partials        ?        0           

Impacted Files	Coverage Δ
src/huggingface_hub/__init__.py	75.75% <ø> (ø)
src/huggingface_hub/hf_api.py	87.41% <100.00%> (ø)

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[camenduru]

🎉 thanks @Kakulukian ♥️ thanks @Wauplin ♥️

[LysandreJik]

Thank you @Wauplin, very clean!

[camenduru]

🥳