Add the option to provide custom splitter in all split methods

[tizianocitro]

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Description

• Added the option to provide custom splitter in all split methods.
• Fixed HData.remove_hyperedges_with_fewer_than_k_nodes.
• Added uv.cache in .gitignore.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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