leidenalg: Add version 0.12.0

[luhenry]

• Package: leidenalg
• Version: 0.12.0
• Source: https://github.com/vtraag/leidenalg
• Docs: https://leidenalg.readthedocs.io/en/latest/

Compiles the leidenalg._c_leiden C++ extension against the igraph C core (1.0.0) and libleidenalg (0.13.0), which upstream's own scripts/build_*.sh clone and build with CMake. Upstream publishes no riscv64 wheel.

Mirrors upstream's build.yml.

Differs from upstream

• riscv64 manylinux/musllinux images instead of x86_64/i686/aarch64
• zlib-devel added to the glibc package list, as upstream's own aarch64 job already does
• Stages the two C cores' GPL notices at the project root, which upstream's wheels omit

Matrix: cp39, upstream's CIBW_PROJECT_REQUIRES_PYTHON floor, whose cp38-abi3 wheel is reused and retested on cp312-cp314; no free-threaded wheel, matching upstream's CIBW_SKIP: cp3??t-*

Testing

• same as upstream

License: Wheel bundles libigraph (GPL-2.0-or-later), libleidenalg (GPL-3.0-or-later) and, on musllinux, the image's libstdc++/libgcc_s; upstream ships no licence text for the two C cores, so the build adds it.

Built on cp39 for both libcs; 688 passed, 28 skipped.