Cypari2

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- Require cysignals >= 1.11.3, use the signal hook
[`https://github.com/sagemath/cypari2/pull/130`] by kliem
- Require Cython >= 3.0, use the trashcan for class Gen
[`https://github.com/sagemath/cypari2/pull/77`] by jdemeyer

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- build wheels for PyPI [`https://github.com/sagemath/cypari2/pull/141`] by mkoeppe
- add missing `noexcept` clauses for Cython 3 [`https://github.com/sagemath/cypari2/pull/160`]
by tornaria
- require Python >= 3.9 [`https://github.com/sagemath/cypari2/pull/155`] by saraedum
- modernize Python metadata [`https://github.com/sagemath/cypari2/pull/158`] by mkoeppe
- add input checking for matrix indices [`https://github.com/sagemath/cypari2/pull/149`]
by fchapoton
- coding style improvements [`https://github.com/sagemath/cypari2/pull/148`,
`https://github.com/sagemath/cypari2/pull/150`,
`https://github.com/sagemath/cypari2/pull/151`,
`https://github.com/sagemath/cypari2/pull/156`,
`https://github.com/sagemath/cypari2/pull/157`,
`https://github.com/sagemath/cypari2/pull/159`] by fchapoton

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- compatibility with Python 3.12 [`https://github.com/sagemath/cypari2/pull/138`]
- compatibility with Cython 3 [`https://github.com/sagemath/cypari2/pull/139`]
- declare build dependencies in `pyproject.toml` [`https://github.com/sagemath/cypari2/pull/139`]

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- compatibility with PARI 2.15
- compatibility with Python 3.11 [`https://github.com/sagemath/cypari2/pull/120`]